Kevin Kelly @kevin2kelly
Senior Maverick at Wired, author of bestseller book, The Inevitable. Also Cool Tool maven, Recomendo chief, and radical optimist. kk.org Pacifica, CA Joined March 2007-
Tweets8K
-
Followers125K
-
Following487
-
Likes8
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
0
4
16
4K
3
Download Image
LOOK Design Tip 87: Patterns on walls are exhilarating #LOOKdesign #designtip #kevinkelly
It's my birthday time, and my present this year is to offer another 101 bits of advice, in a nice handy list. Enjoy! kk.org/thetechnium/10…
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
LOOK Design Tip 86: A corner never needs to be boring #LOOKdesign #designtip #kevinkelly
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
LOOK Design Tip 85: An swirling line enlivens its environment #LOOKdesign #designtip #kevinkelly
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
LOOK Design Tip 84: Universally recognized, a hand commands attention #LOOKdesign #designtip #kevinkelly
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
LOOK Design Tip 83: Straight lines, in geometric patterns #LOOKdesign #designtip #kevinkelly
An update on the nearing completion of the 10,000-year clock as it begins ticking underground in west Texas. longnow.org/clock-faq/
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
LOOK Design Tip 82: No matter the material, towers always attract attention #LOOKdesign #designtip #kevinkelly
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
LOOK Design Tip 81: The blessing of birds expressed only by their silhouette. #LOOKdesign #designtip #kevinkelly
Gigabloom happening right now on Mori Point in Pacifica, 20 minutes south of San Francisco.
For more advice see my new book Excellent Advice for Living amzn.to/3mQL4c4 #excellentadvice
LOOK Design Tip 80: The crudest sketch can convey animal spirits #LOOKdesign #designtip #kevinkelly
I am all for the Enhanced olympics. It's an old idea whose time has come.
I am all for the Enhanced olympics. It's an old idea whose time has come.
Tim Ferriss @tferriss
2.0M Followers 3K Following Author of 5 #1 NYT/WSJ bestsellers, early-stage investor (https://t.co/cpVCd1q9Hk), Tim Ferriss Show podcast (1B+ downloads), founder of https://t.co/9bQjti0XgE
Michael Nielsen @michael_nielsen
96K Followers 6K Following Searching for the numinous 🇦🇺 🇨🇦, home in 🇺🇸 Research @AsteraInstitute https://t.co/maezekzRUb
Erik Torenberg @eriktorenberg
116K Followers 3K Following Founder @turpentinemedia | Co-founder/founding team @beondeck, @villageglobal @producthunt
Stewart Brand @stewartbrand
52K Followers 466 Following Co-founder of The Long Now Foundation--which takes no sides. In this forum, as a private person, I do take sides occasionally.
Paul Millerd @p_millerd
28K Followers 4K Following Helping people thrive on pathless paths 📘 45k sold https://t.co/b4ARw5pFj9 Community https://t.co/vaLzoFXTWS Podcast https://t.co/vI98eSVg4D
George Mack @george__mack
287K Followers 942 Following The best ideas I think or find. Get the best ideas, essays and videos I've collected here: https://t.co/q33ixsFPbq
Luke Burgis @lukeburgis
36K Followers 3K Following Tech Stack: Microsoft Word. Book: https://t.co/t3W07cdhIv Substack: https://t.co/eNQyQJZl17
Ben Thompson @benthompson
239K Followers 2K Following Author/Founder of @stratechery. Host of @ditheringfm @sharptechpod. @notechben for sports. @monkbent on other networks. Home on the Internet.
Mike Maples, Jr @m2jr
84K Followers 7K Following Unearthing the mysteries of outlier startups. Partner @floodgatefund. Unabashedly grateful to live in the USA.
Jason Crawford @jasoncrawford
33K Followers 3K Following Founder, @rootsofprogress. I write about the history of technology and the philosophy of progress. Working to build the progress community and movement
Craig Mod @craigmod
37K Followers 703 Following Find me on my newsletters or Threads / Insta / Mastodon: https://t.co/qaYZKnl3i8 https://t.co/Csn5oOy6ef
Long Now Foundation @longnow
50K Followers 6K Following Long Now is a non-profit organization fostering long-term thinking and responsibility in the framework of the next 10,000 years.
Chris Anderson @chr1sa
183K Followers 2K Following Occupy the skies. @chr1sa2 on Threads Photo by @chrismichel
Eli Dourado @elidourado
38K Followers 378 Following On a sacred quest to increase the pace of economic growth at @abundanceinst. On the side of the builders. tfp/acc 🚀
Anna Gát 🧭 @TheAnnaGat
29K Followers 3K Following Founder & CEO: @interintellect_ 🧭 Bio: https://t.co/h6zEGcDxdp • Words: https://t.co/SIYDK2MdpB
Kpaxs @Kpaxs
79K Followers 1K Following Curator of big ideas💡, mental models⚡and brain bugs🐛 to help you think smarter 🧠. Subscribe to my newsletter for more: https://t.co/0wBmA6jUuk
Ramez Naam @ramez
54K Followers 7K Following Climate and clean energy investor. Author of 5 books. Energy & Environment co-chair @SingularityU. Trying to build a better world.
Christopher Michel @chrismichel
27K Followers 911 Following Artist-in-Residence at the National Academies of Sciences, Engineering & Medicine. Photographer of Extraordinary Humans. Board: @catchlight_io. Fellow RGS.
Anne-Laure Le Cunff @neuranne
65K Followers 3K Following • founder @ness_labs (https://t.co/3n5nrixK7t) • neuroscience of learning @KingsIoPPN • I write about lifelong curiosity, creative thinking & mindful productivity
David Schwarting @dsadm
148 Followers 366 Following ABAP | Road Cycling | Running | Traveling | Food | Rowing @[email protected] @dsadm.bsky.social
Andrej Dratschuk 🏆 @AndrejDratschuk
30 Followers 1 Following Posts on self-improvement for young men. Sharing the insights from my journey to become my best self.
Vlad Bogos @VladBogos
1K Followers 963 Following Operations Lead & People Manager @IBMconsulting Retired founder @TackleRomania 🇷🇴 #FPL enthuziast Views my own, reflect the absolute truth.
Philip Askew @PhilipAskew2
32 Followers 931 Following
Cornelius van Niekerk @TheCorneliusvN
14 Followers 31 Following Creative Scatterbrain to 9-year Solopreneur. Building a service business into an online business. Tweeting optimised mindset, stoicism, positive psychology.
chocolat.plage @chocolat_plage
90 Followers 2K Following i write feelings into words. ©︎All words are by me Instagram→@chocolat_plage
Gustavs Zilgalvis @GZilgalvis
360 Followers 881 Following International Policy @FSIStanford / Scholar @StanfordGKC / CEO @CurrentAI / Fellow @RANDCorporation / Director @SpaceGovern
Vignesh. N @Vignesh83219102
186 Followers 3K Following
Shivi Bhandari @bhandari_shivi
2 Followers 47 Following
Dirk Eschenbacher @zedirk
181 Followers 203 Following Design, technology, travel and motorbikes straight from Beijing, China
Bahaar Jain @BilloKiChai
11 Followers 70 Following
Grayson Morris @grayson_morris
67 Followers 213 Following
Soci @soci_sf
999 Followers 42 Following 𝐁𝐞𝐚𝐮𝐭𝐲 𝐢𝐬 𝐩𝐨𝐰𝐞𝐫 𝐇𝐢𝐤𝐢𝐧𝐠 🧗♂️ / 𝐠𝐨𝐥𝐟 ⛳/ 𝐜𝐨𝐨𝐤𝐢𝐧𝐠🍳 / 𝐲𝐨𝐠𝐚 🧘♀️ / 𝐫𝐞𝐥𝐚𝐱 𝐨𝐧 𝐭𝐡𝐞 𝐛𝐞𝐚𝐜𝐡 ⛱️
Amee Kapadia @ameekapadia
3K Followers 796 Following investing in bio and the near frontier @cantos🧬🛰🌎 | 📝 https://t.co/qOai5r04Rr | @stanfordgsb @JHUbme
Jeff Huberman @hubiesheros
11 Followers 101 Following Aspiring smart person. Birds Fan. Always on some kind of diet.
Akanksha Yadav @akankshay58
490 Followers 3K Following graduate student in Shapiro lab @Caltech | prev @HHMIJanelia @mpi_nat @iitbombay | chemistry, systems biology, protein engineering, episodic poet
Sumner L Norman @SumnerLN
2K Followers 794 Following CEO of @ForestNeurotech FRO. // Ultrasound Neurotech→Sync'ing biology with humankind/technological progress // Affiliate @Caltech & Advisor @AEStudioLA
Eran Arkin @therealarkin
3K Followers 1K Following Product Management Leader. Life Long Learner. Ex-Google/Meta/GetSentry Director | Longevity | Dad | #productmanagement | DMs are open
tebooker @tebooker
175 Followers 2K Following
binaryoceans @binaryoceans
36 Followers 671 Following
Justin Cripps @TheJustinCripps
5 Followers 254 Following I keep updating my bio with what I like, but it changes so much that I have stopped bothering. Suffice to say that I am a creative type searching for an outlet.
Christopher @Christo38886665
163 Followers 620 Following Some day I'm gonna get off Twitter. Maybe tomorrow...
Woe @NightPerson____
1 Followers 366 Following
🌻🗽CentralScruti.. @CipherKnot
1K Followers 3K Following Well I love the sound when I smash the glass, If I get caught they're gonna kick my ass. —SD
Lucas Sussman @SussmanLucas
20 Followers 320 Following
Matt van Deventer @vanders
323 Followers 827 Following Good at fighting games, bad at driving games. @[email protected]
nedned @nletcher
1K Followers 5K Following data (science | analytics | visualisation | engineering), @thoughtworks, #Python, #nlproc, ML, & assorted whimsical miscellania
Tanya @tanya_singh_t
171 Followers 624 Following
Burt's Pest Control @BurtsBedBugs
62 Followers 76 Following
RLM @dewwillrustthem
11 Followers 92 Following
Already... @DeArtagne08
457 Followers 421 Following I ain't the captain of the yacht, but i'm on the boat...
Chakri Josyam @Chakri_jn
45 Followers 27 Following Product Manager. Pattern and trend observer.Canyoneer | Reader | Biker | Hiker.
Sander van Zanten @SandervanZanten
411 Followers 911 Following Audio Director @KeokeN | @DeliverTheMoon
Ryan Davidsen @birdogg
326 Followers 168 Following
Daniel Ashworth, Jr. @DAAJr904
1K Followers 5K Following Tonya's husband, Nyssa's daddy, Louisiana Redbone descendant, Mississippi State Bulldog, UPenn Quaker. I design vibrant & active spaces for people.
Claire @CBerlana
40 Followers 239 Following
Sawyer Neame @sawyerneame
140 Followers 114 Following
Guy @Guy103425
5 Followers 28 Following
Tim Ferriss @tferriss
2.0M Followers 3K Following Author of 5 #1 NYT/WSJ bestsellers, early-stage investor (https://t.co/cpVCd1q9Hk), Tim Ferriss Show podcast (1B+ downloads), founder of https://t.co/9bQjti0XgE
Michael Nielsen @michael_nielsen
96K Followers 6K Following Searching for the numinous 🇦🇺 🇨🇦, home in 🇺🇸 Research @AsteraInstitute https://t.co/maezekzRUb
Robin Hanson @robinhanson
90K Followers 656 Following Let’s skip witty repartee & discuss fundamental questions. Views are mine, not GMU’s or Virginia’s. Books: https://t.co/hpZgEm5DBI, https://t.co/iFs9C3J2Ek
Stewart Brand @stewartbrand
52K Followers 466 Following Co-founder of The Long Now Foundation--which takes no sides. In this forum, as a private person, I do take sides occasionally.
tylercowen @tylercowen
231K Followers 526 Following new book *Talent: How to Identify Energizers, Winners, and Creatives Around the World*, https://t.co/7bU5cUdOBc, Conversations with Tyler, Bloomberg Opinion.
Ben Thompson @benthompson
239K Followers 2K Following Author/Founder of @stratechery. Host of @ditheringfm @sharptechpod. @notechben for sports. @monkbent on other networks. Home on the Internet.
Jason Crawford @jasoncrawford
33K Followers 3K Following Founder, @rootsofprogress. I write about the history of technology and the philosophy of progress. Working to build the progress community and movement
Craig Mod @craigmod
37K Followers 703 Following Find me on my newsletters or Threads / Insta / Mastodon: https://t.co/qaYZKnl3i8 https://t.co/Csn5oOy6ef
Long Now Foundation @longnow
50K Followers 6K Following Long Now is a non-profit organization fostering long-term thinking and responsibility in the framework of the next 10,000 years.
Chris Anderson @chr1sa
183K Followers 2K Following Occupy the skies. @chr1sa2 on Threads Photo by @chrismichel
Ramez Naam @ramez
54K Followers 7K Following Climate and clean energy investor. Author of 5 books. Energy & Environment co-chair @SingularityU. Trying to build a better world.
Christopher Michel @chrismichel
27K Followers 911 Following Artist-in-Residence at the National Academies of Sciences, Engineering & Medicine. Photographer of Extraordinary Humans. Board: @catchlight_io. Fellow RGS.
Andy Matuschak @andy_matuschak
56K Followers 2K Following More wonder, more insight, more expression, more joy! Independent researcher; currently exploring tools that augment human memory and attention.
Erik Brynjolfsson @erikbryn
209K Followers 4K Following Director @DigEconLab Professor @StanfordHAI @SIEPR @Stanford @NBERPubs https://t.co/D2bPyxoFEf
Devon ☀️ @devonzuegel
52K Followers 1K Following I've gone to look for myself. If I return before I get back, please ask me to wait. Prev @StanfordReview @Affirm @GitHub @NotionHQ. Building a modern Chautauqua
OM @om
1.2M Followers 2K Following Partner Emeritus @TrueVentures. Founder of GigaOM. I write about technology! ✍🏼+ 📸 + 🌐 = https://t.co/81PkGbMhIN (Sign-up for my free newsletter https://t.co/DlJUkuxOfZ )
Andy Weissman @aweissman
43K Followers 2K Following USV | real names be proof | maybe so and maybe not
Derek Sivers @sivers
290K Followers 10K Following Not using Twitter lately so please email me instead: https://t.co/5QegppOCSk
kasra @kasratweets
7K Followers 1K Following "I am a wow-ist. I just go around in amazement and say 'wow' at things" https://t.co/WgoPOcxgNA
Spencer Greenberg �.. @SpencrGreenberg
19K Followers 6K Following A mathematician/entrepreneur in social science. Tweets about psychology, society, rationality, tech, science, and philosophy. Founder of https://t.co/2YGraOwo77
Enhanced Games @enhanced_games
25K Followers 274 Following The Enhanced Games is the Olympics of the future – an open celebration of science and human enhancements.
Leila Clark @leilavclark
726 Followers 351 Following sunny apartment enjoyer. occasional coder. longer thoughts at https://t.co/v85nsulPQR. Deep work tracker at https://t.co/sk8Uy0tFle.
Matt Webb 🌸🌼�.. @genmon
18K Followers 1K Following Maker of things like Poem/1 (AI hardware), Galactic Compass (iPhone app), founder Acts Not Facts. Blogger. Behind the mountains there are more mountains
Dwarkesh Patel @dwarkesh_sp
54K Followers 699 Following Being pretrained Host of Dwarkesh Podcast https://t.co/3SXlu7fy6N https://t.co/rEhnfYywXY https://t.co/hQfIWdM1Un
Guillaume Verdon @GillVerd
52K Followers 3K Following Founder & CEO @Extropic_AI • prev: Physics & AI R&D @ (Alphabet X / Google) • Founder @ TensorFlow Quantum • (PhD(ABD) + MMath) @ (IQC / UWaterloo / PI) • e/acc
Nick Gray / How to Ma.. @nickgraynews
42K Followers 3K Following Follow me to be more interesting and meet inspiring people 👋🏻 I built and sold 2 multi-million dollar companies, Museum Hack and FDS Avionics
Ari Holtzman @universeinanegg
3K Followers 2K Following PI @UChicagoCS & @DSI_UChicago, leader of Conceptualization Lab https://t.co/BVCT3zdaNV, Post-doc @Meta. We don’t really know much about language models...yet.
Golden Age Explosions.. @ComicExplosions
486 Followers 191 Following just explosions from old comic books. Not a bot, send me your favourite explosions!
Katie Drummond @katiedrumm
14K Followers 672 Following global EIC of @wired. I do not post here often!
Kate Bowler @KatecBowler
50K Followers 2K Following 📖 3X New York Times bestseller 🍎 @DukeDivinity 🎙 Everything Happens
Marc Randolph @mbrandolph
100K Followers 661 Following Co-founder of @Netflix & 6 other companies 🏔🏄♂️🚴Outdoor enthusiast
lawrence wilkinson @lhwilkinson
374 Followers 197 Following Serial entrepreneur, turned advisor/investor, mostly to not-for-profit and social ventures
Farhan Thawar @fnthawar
23K Followers 12K Following FOLLOWS YOU. VP & Head of Eng @Shopify - Helpful (Acquired), Pivotal, Xtreme (Acquired), Achievers, Microsoft, Trilogy, Waterloo. Everything you know is wrong!
Claire Hughes Johnson @chughesjohnson
18K Followers 2K Following Author of Scaling People. Work @stripe. Board member, mom, wife and busy friend. Never enough time to read all on my list. Pretend to garden. Roughly that!
D.A. Wallach @dawallach
1.1M Followers 1K Following Life sciences & healthcare investor. Occasional recording artist. https://t.co/ISRFxgQlfM
Dreaming Tulpa 🥓�.. @dreamingtulpa
34K Followers 1K Following Coder and AI whisperer | 🇨🇭 | @aiia_dao Keeping up to date with Generative AI on https://t.co/JjX7INV1K5 Building https://t.co/0tHHSgyHnn More here 👉 https://t.co/8ES5KiPMND
David Galbraith @daveg
8K Followers 2K Following I invented Twitter bios, like this, among other things. https://t.co/xBmFQEvMhb
Stelfie the Time Trav.. @StelfieTT
18K Followers 17 Following 🇮🇹 Hi, I'm #Stelfie, a fictional AI character. In a parody of life and history powered by an Artist and AI, I time travel and take stelfies. -
Dan Gardner @dgardner
28K Followers 525 Following New York Times bestselling author and co-author of many books. My website: https://t.co/S17Y9SDxGE. My newsletter: https://t.co/XVtKxu6iVi.
Gregory Wieber @dreamwieber
4K Followers 936 Following Art & Code. Gardener. Maker of things. (Views / creations expressed here are my own.)
Smarter Every Day @smartereveryday
373K Followers 1K Following Hello, I'm Destin. I'm an Engineer with a YouTube channel called "Smarter Every Day".
Jason Zweig @jasonzweigwsj
229K Followers 2K Following Investing columnist for @WSJ. Editor, Benjamin Graham's *The Intelligent Investor.* Author, *Your Money and Your Brain* and *The Devil's Financial Dictionary.*
small worlds @smllwrlds
10K Followers 2K Following In 2023, I created a tiny sci-fi story every day. In 2024, who knows?
Stable Diffusion 🎨.. @DiffusionPics
59K Followers 41 Following Stable Diffusion powered Generative AI Art 🖼️ Animation 🎞 & Research 🧪 by #StabilityAI 🤖 AI image generation #SDXL #ControlNet #AnimateDiff (Midjourney)
City of Pacifica @Pacifica
3K Followers 67 Following City of Pacifica, California - Official Site. https://t.co/RtExA7NKiY
Ethan Mollick @emollick
210K Followers 551 Following Professor @Wharton studying AI, innovation & startups. Democratizing education using tech Book: https://t.co/CSmipbJ2jV Substack: https://t.co/UIBhxu4bgq
Morgan Housel @morganhousel
520K Followers 701 Following @collabfund The Psychology of Money: https://t.co/Q2XICE6VhE Same As Ever: https://t.co/1HOKjvZAcU Director at Markel Group
Stephen Witt @stephenwitt
2K Followers 327 Following New Yorker contributor. Author of "How Music Got Free," now a documentary feature premiering at SXSW24. Currently writing a book about Nvidia.
Matthew Yglesias @mattyglesias
542K Followers 2K Following Slow Boring, cohosting https://t.co/wxUj3JFSFf, Bloomberg columnist
Sahil Bloom @SahilBloom
1.1M Followers 127 Following Exploring my curiosity and sharing what I learn along the way. Gave up a grand slam on ESPN in 2012 and still waiting for it to land.
Eric Mead @meaderic
6K Followers 293 Following
JVDE @Jvde_AI
4K Followers 3K Following Visual Artist • Photographer • AI Explorer • Graduated at the Royal academy of Arts (The Hague, the Netherlands) • MAIF • EW Collective
bookofjoe @bookofjoe
7K Followers 92 Following https://t.co/XrbrDm4xc1 YouTube: https://t.co/u7Gy1VmZIl https://t.co/HgDJctoWPE https://t.co/V7rArWx4iI Neurosurgical anesthesia: https://t.co/cRLM67pfIX…
Lex Fridman @lexfridman
3.5M Followers 126 Following Host of Lex Fridman Podcast. Interested in robots and humans.
Eliot Peper @eliotpeper
4K Followers 999 Following Novelist: Foundry, Reap3r, Veil, Breach, Borderless, Bandwidth, Neon Fever Dream, Cumulus, Exit Strategy, Power Play, and Version 1.0 (https://t.co/lwnCSXIVuI).
unknowable_ai @unknowable_ai
45 Followers 0 Following transmissions from an unknowable place. ai art made with stable diffusion by @davemakes
Suhail @Suhail
295K Followers 464 Following Founder: @playground_ai, @mixpanel Pizzatarian, programmer, music maker
Julian Shapiro @Julian
278K Followers 140 Following Storyteller at https://t.co/LzP2yuIl81. Deeptech investor at https://t.co/0C5yNeQ8YO. Monthly essays: https://t.co/6LyabD1EO2. Fan of hifi audio and the UFC.
lizandmollie @lizandmollie
55K Followers 472 Following An affectionate look at the emotions of work. Art Liz @fosslien, book No Hard Feelings by @fosslien and @molliewest.
Dustin Moskovitz @moskov
75K Followers 513 Following
SALT @SALT_VERSE
10K Followers 2 Following SALT is the world's first fully AI-generated multiplot "film" - a web6 internet adventure where your choices create a 1970s lo-fi sci-fi universe.
Somnai @Somnai_dreams
15K Followers 233 Following
@kevin2kelly @bookofjoe You can do this in Finder, also! It creates a copy of the file with background removed. That’s brilliant! (Discovered about a week ago!).
special for @kevin2kelly @rossetto
@nils_gilman @LeapingRobot That’s a complaint? Rejoice.
People I admire: Writer & Philosopher, @nealstephenson. @Interval @longnow @kevin2kelly
500px Editors' Choice : lenticular clouds in franz josef by ChristopherMichel
Embrace Watch from @empatica and @MIT @medialab is in 5 Trends Defining Social Innovation in 2015 classyawards.org/exchange/5-tre… via @classyawards
Trends for United States
5.212 posts
2.863 posts
2.012 posts
3.724 posts
2.784 posts
3.063 posts
6.761 posts
22 B posts
21,6 B posts
61,1 B posts
2.328 posts
3.827 posts
36,6 B posts
1,18 Mn posts
34 B posts
13,5 B posts
3.969 posts
57,2 B posts
7.207 posts
You might like
Naval
@naval
2.4M Followers
Tim Ferriss
@tferriss
2.0M Followers
Marc Andreessen 🇺�..
@pmarca
1.4M Followers
Founders Fund
@foundersfund
110K Followers
Paul Graham
@paulg
1.9M Followers
Patrick Collison
@patrickc
457K Followers
Shane Parrish
@ShaneAParrish
512K Followers
cdixon.eth
@cdixon
887K Followers
Nassim Nicholas Taleb
@nntaleb
1.0M Followers
Bryan Johnson /dd
@bryan_johnson
254K Followers
benahorowitz.eth
@bhorowitz
652K Followers
Tim Urban
@waitbutwhy
823K Followers
Elad Gil
@eladgil
160K Followers
Morgan Housel
@morganhousel
520K Followers
Daniel Gross
@danielgross
94K Followers