Research Worlds · free
Walk the papers that changed what we thought was possible — in words anyone can follow. No account. No paywall. 25 live worlds.
Featured paper · 1997
Wilmut et al., 1997
Scientists grew a lamb from a grown-up cell. You will move a nucleus, empty an egg, and see why almost every try failed — except one.
Nature 385, 810–813 (27 February 1997)
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Each world is a bench you can walk. Simple language first. The original paper is still there if you want it.
1953 · Molecular biology
Watson & Crick, 1953
DNA is a double helix. Each strand is a template for the other — that is how living things copy a recipe.
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1948 · Information theory
Shannon, 1948
A photo, a DNA sequence, a sentence, and a radio signal can all be treated as information moving through noise.
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1950 · Computer science
Turing, 1950
Instead of arguing what “thinking” means, Turing asked: can a machine’s answers be told apart from a person’s?
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1974 · Psychology
Tversky & Kahneman, 1974
When we guess chances, a number we just saw can pull the guess toward it — even when it should not matter.
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1965 · Medicine
Bradford Hill, 1965
“Correlation isn’t causation” is only the start. Hill asked when an observed link is strong enough to act on.
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1970 · Economics
Akerlof, 1970
If buyers cannot tell a good car from a lemon, they will not pay a good-car price — and the good cars leave.
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1981 · Game theory
Axelrod & Hamilton, 1981
If you will meet again, helping can win. You do not need kind souls — you need memory, repetition, and incentives.
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1967 · Climate physics
Manabe & Wetherald, 1967
They modelled how heat moves through air, including water-vapour feedback, and asked what extra CO₂ does.
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2012 · Biotechnology
Jinek et al., 2012
Cas9 can be pointed at a chosen DNA sequence with an RNA guide, then cut. Reading the genome became rewriting it.
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2017 · Artificial intelligence
Vaswani et al., 2017
Instead of reading a sentence one word after another, the model looks at all the words at once and decides what to pay attention to.
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1987 · Computer graphics
Reynolds, 1987
Enter a sunlit aviary and change the rules behind the motion.
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1993 · Nonlinear dynamics
Pearson, 1993
Enter a bright chemical pattern laboratory. Change the feed and watch a numerical reaction field respond.
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2008 · Collective dynamics
Sugiyama and colleagues, 2008
Enter a daylight circular test track. Follow a car, then follow the slow region moving through the traffic.
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2002 · Synchronization
Pantaleone, 2002
Enter a sunlit mechanics laboratory. Lock the shared base or change the tempo mismatch.
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2005 · Capillarity
Vella & Mahadevan, 2005
Explore a bright tabletop interface. Change the meniscus signs or remove one effective load.
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1963 · Nonlinear dynamics
Lorenz, 1963
Enter a bright state-space observatory. Compare identical and perturbed starts, then change the model regime.
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2018 · Fracture mechanics
Heisser and colleagues, 2018
One bend can trigger several cracks. Can a twist stop the cascade?
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2007 · Electrohydrodynamics
Fuchs and colleagues, 2007
A liquid connection with no pipe. What happens when the voltage stops?
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2014 · Chain mechanics
Biggins and Warner, 2014
A chain falls down. So why do its beads first rise above the cup?
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1991 · Mechanical networks
Cohen and Horowitz, 1991
Cut a supporting link. Why does the weight end up higher?
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2016 · Thermal fluid dynamics
Li and colleagues, 2016
No motor and no downhill slope. What pushes a droplet across a hot ratchet?
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2012 · Waves and mechanics
Cross and Wheatland, 2012
Release the top. Why does the bottom of a falling slinky briefly stay in place?
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2014 · Rotational mechanics
Ma and colleagues, 2014
Why does a wobbling disc seem to speed up just before it stops?
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2017 · Rigid-body dynamics
Kondo and Nakanishi, 2017
Why does this spinning toy turn back without another push?
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Explore the live library. Individual resources include learning guidance and access to the activity.
DNA is a double helix. Each strand is a template for the other — that is how living things copy a recipe.
A photo, a DNA sequence, a sentence, and a radio signal can all be treated as information moving through noise.
Instead of arguing what “thinking” means, Turing asked: can a machine’s answers be told apart from a person’s?
When we guess chances, a number we just saw can pull the guess toward it — even when it should not matter.
“Correlation isn’t causation” is only the start. Hill asked when an observed link is strong enough to act on.
If buyers cannot tell a good car from a lemon, they will not pay a good-car price — and the good cars leave.
If you will meet again, helping can win. You do not need kind souls — you need memory, repetition, and incentives.
They modelled how heat moves through air, including water-vapour feedback, and asked what extra CO₂ does.
Scientists grew a lamb from a grown-up cell. You will move a nucleus, empty an egg, and see why almost every try failed — except one.
Cas9 can be pointed at a chosen DNA sequence with an RNA guide, then cut. Reading the genome became rewriting it.
Instead of reading a sentence one word after another, the model looks at all the words at once and decides what to pay attention to.
Enter a sunlit aviary and change the rules behind the motion.
Enter a bright chemical pattern laboratory. Change the feed and watch a numerical reaction field respond.
Enter a daylight circular test track. Follow a car, then follow the slow region moving through the traffic.
Enter a sunlit mechanics laboratory. Lock the shared base or change the tempo mismatch.
Explore a bright tabletop interface. Change the meniscus signs or remove one effective load.
Enter a bright state-space observatory. Compare identical and perturbed starts, then change the model regime.
One bend can trigger several cracks. Can a twist stop the cascade?
A liquid connection with no pipe. What happens when the voltage stops?
A chain falls down. So why do its beads first rise above the cup?
Cut a supporting link. Why does the weight end up higher?
No motor and no downhill slope. What pushes a droplet across a hot ratchet?
Release the top. Why does the bottom of a falling slinky briefly stay in place?
Why does a wobbling disc seem to speed up just before it stops?
Why does this spinning toy turn back without another push?
Lesson