#1

Padmasree Padmasree 1,218,682 followers (7 on this list)
Bio CTO of Cisco
Location California
Web http://newsroom.cisco...
Other lists:  ctos, information-technology, innovation, management

#2

TEDchris Chris Anderson 964,217 followers (20 on this list)
Bio TED = Ideas worth spreading!
Location New York City
Web http://www.ted.com
Other lists:  ideas, media

#3

SpaceAstro Space & Astronautics 126,180 followers (15 on this list)
Bio NASA, ESA, NOAA, USGS, astronomy, space, weather, hurricanes, oceans, Earth science, earthquakes, aerospace. Editor/Journalist. Also: @oceanechoes @helpanimals
Location Space & Astronautics News
Web http://space.gs
Other lists:  nasa, physics, space-astronautics, tech-news, Weather_News, nasa

#4

donttrythis Adam Savage 104,844 followers (19 on this list)
Bio I play a scientist on TV
Location San Francisco
Web http://www.adamsavage...
Other lists:  geek, television

#5

CynthiaY29 Cynthia Yildirim 57,421 followers (2 on this list)
Bio Author/Poet/Geek - Love my kids, World News, IT, Science, Space, Art, Politics, Independent voter. Observing the world, seeking knowledge. 平和 幸福 愛 友情
Location Florence, Alabama
Web https://sites.google....
Other lists:  author, blogger, followback, marketing, news, politics, socialmedia, twitter, writer

#6

NIHforHealth NIH for Health 47,601 followers (13 on this list)
Bio NIH is the nation's medical research agency - making important medical discoveries that improve health and save lives.
Location Bethesda, Maryland, USA
Web http://www.nih.gov/
Other lists:  government, health

#7

grantimahara Grant Imahara 45,324 followers (10 on this list)
Bio Robot builder, modelmaker and television host on Mythbusters.
Location San Francisco, CA
Web http://dsc.discovery....
Other lists:  electronics, engineers, geek, movie-film-promotion

#8

Discovery Discovery Channel 37,419 followers (17 on this list)
Bio News from Discovery Channel U.S. PR - Katherine, Liz, Josh, Amy, Sarah, Alison + Christine. Press site at press.discovery.com
Location United States
Web http://discovery.com
Other lists:  media, public-relations, tv

#9

AmericanElement American Elements 32,340 followers (25 on this list)
Bio Science Technology from American Elements- Nanotechnology, Robotics, AdvancedMaterials, AlternativeEnergy, Lasers, Military, GreenTechnology, LifeScience, Space
Location HQ:L.A.,Ca +UK, Brazil+China
Web http://www.americanel...
Other lists:  defense, geek, tech

#10

TheLeakeyFndtn TheLeakeyFoundation 29,632 followers (2 on this list)
Bio To increase scientific knowledge, education and public understanding of human origins evolution, behavior and survival.
Location San Francisco, CA
Web http://leakeyfoundati...
Other lists:  africa, anthropology, archaeology, eco, evolution, grants, humanorigins, nature, primates

#11

UFO4U Danny Shook 28,612 followers (1 on this list)
Bio I am an #American #NEWS ADDICT living in #Germany-I #FollowBack, however, I #Block those who choose only to be followed, it's a hobby of mine.
Location Dreieich, Germany
Web http://ufo4u.blogspot...
Other lists:  followback, green, health, news, odd, people, psychology, space, technology

#12

raduboncea Radu Boncea 26,123 followers (4 on this list)
Bio programmer,pythonist,java,C,erlang noob,layer 4-5,tech geek,system engineer,blogger,apple fan,cloud computing otaku,datacenter,datagrid,hitech gadgeteer,father
Location Bucharest, Romania, EU
Web http://raduboncea.ro
Other lists:  cloud-computing, datacenters, engineers, geek, itnews, java, python, tech, technology

#13

twisst Twisst ISS alerts 25,409 followers (8 on this list)
Bio Get alerts from this twitter account when international space station (ISS) will be passing over your exact location. Astronomy, science, @tjaap.
Location Netherlands
Web http://www.twisst.nl
Other lists:  astronomy, space-astronautics

#14

BadAstronomer Phil Plait 23,357 followers (42 on this list)
Bio Astronomer, author, skeptic, funny guy, writer
Location Boulder
Web http://www.badastrono...
Other lists:  astronomy, nasa

#15

scifri Science Friday 23,068 followers (39 on this list)
Bio We make a science radio program heard on NPR and create science content for the web. Got ideas? Write us @scifri and tweet your questions during the show.
Location New York, New York
Web http://www.sciencefri...

#16

ozgexo Ozge Snærós 19,425 followers
Bio I am a Jedi, like my father before me.
Location Jedi Temple, GC

Other lists:  blogger, blogging, books, fashion, fave, fun, movies, music, personal

#17

mymiaomiao Shirley 18,316 followers (1 on this list)
Bio Don't stumble upon success, Plan it! Graduate Biology student doing real estate and made millions
Location San Diego
Web http://www.uslawfirml...
Other lists:  biology

#18

jcchancellor Jeff Chancellor 18,062 followers (3 on this list)
Bio President & CEO of the Cancer Warrior Coalition. We are working to build a cancer therapy and research center in Texas.
Location Houston, Texas
Web http://cancerwarriorc...
Other lists:  cancer, cmo, cmos, physics

#19

sciam Scientific American 17,682 followers (48 on this list)
Bio Scientific American Magazine and online, over 150 years of science news
Location New York City, NY, USA
Web http://www.scientific...
Other lists:  news, tech

#20

CERN CERN 15,439 followers (25 on this list)
Bio CERN, the European Organization for Nuclear Research, is the biggest particle physics laboratory in the world.
Location Geneva
Web http://www.cern.ch
Other lists:  nuclear, physics