Our missionFor usersFor creatorsFeaturesEarly accessDiscoverOpen the beta
Sample library. These profiles and videos are Circin's own demo content, written to show how the app works — they are not people who joined or videos anyone uploaded. Real creators get a page at circin.org/c/<name> as soon as they publish. Be one of the first →
Subjects / Science

Science

Biology, chemistry, physics, space and the living world — how things actually work.

HealthSpace and AstronomyEnvironmental ScienceEarth SciencePhysicsChemistryBiology

Popular in Science

0:47Lesson
Why salt actually melts ice
Dr. Maya Chen · Chemistry
0:51Lesson
What a cell does all day
Lucia Ortega · Biology
0:40Lesson
How vaccines train immune memory
Deniz Rahimi · Biology
1:28Analysis
Your cells replace themselves — mostly
Rosa Delgado · Biology
1:21Hands-On
Rust never sleeps
Nadia Rahman · Chemistry
1:14Learn Along
Why water is weird
Dr. Ivan Petrov · Chemistry
1:07Lesson
Entropy is not messiness
Theo Karaval · Physics
1:00Analysis
Why heavy and light fall together
Lucia Ortega · Physics
0:53Hands-On
Why earthquakes cluster where they do
Jonah Feld · Earth Science
0:46Learn Along
Plate tectonics: the 1cm engine
Priya Nair · Earth Science
0:39Lesson
Wetlands are flood insurance
Kwame Osei · Environmental Science
1:27Analysis
The carbon cycle in 60 seconds
Elena Markovic · Environmental Science

Questions people are exploring Sample

Written for the demo, not posted by anyone. They show the kind of question a video can carry.

Q: At 0:42 — why does the road get COLDER while the ice is melting? That feels backwards. → Why salt actually melts ice

People worth hearing from

MCDr. Maya ChenSample
@mayachenchem · Chemistry · Science
Chemistry PhD. I make reactions make sense. Ex-lab tech, full-time explainer.
Why salt actually melts iceInfinity comes in sizesWhy hydration claims get exaggerated
LOLucia OrtegaSample
@bio.lucia · Biology · Science
Field biologist. Life is stranger than fiction.
Photosynthesis in 6 boardsWhat a cell does all dayWork backwards like a mathematician
FAFatima AhmadiSample
@fatimamath · Math · Algebra
Math should feel like a magic trick you understand. Former competition coach.
The math trick behind a perfect card sWhat a proof actually isWhat sleep debt actually does
ABProf. Ade BalogunSample
@historywithade · World History · History
Historian. Context over dates. Author of two books on empire and memory.
The 1885 map that carved up a continenWhy your brain rewards procrastinationThe derivative is just a zoom
SRSam RiveraSample
@samcodes · Coding · Computer Science
Software engineer. One function at a time. Vanilla JS enthusiast.
Build a to-do list before this endsWhat 'training' a model really meansThe memory trick eyewitnesses fall for
EMElena MarkovicSample
@elenafinance · Finance · Economics
CFA. Personal finance without the jargon. Education, not advice.
Your first index fund, explainedThe trolley problem, minus the clichésThe birthday paradox, for real