Browser games and pointless experiments. Nothing to install.
Browser games and pointless experiments. Nothing to install.
Fold a sheet of paper in half. Then again. How many folds to reach the moon?
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One Line DrawTrace every line once, without lifting Yes, in arithmetic. A sheet of paper is about 0.1 millimetres thick. Fold it once and it is 0.2mm. Every fold doubles the thickness, and doubling is relentless in a way human intuition simply refuses to accept. At 42 folds you pass the Moon. At 51 you reach the Sun.
This game lets you fold and watch the number climb, with a running comparison against real objects, so the abstraction turns into a sequence of things you actually recognise. The early folds are boring, which is the point. The last few are absurd.
Human estimation is roughly linear. We are good at adding and terrible at compounding, which is why the growth feels impossible right up until it is obvious. The classic illustration is the chessboard: one grain of rice on the first square, doubling each square, and by square 64 you owe more rice than has ever been grown on Earth.
The same blind spot shows up everywhere that matters. Compound interest, epidemic curves and viral spread all feel slow and harmless during the early doublings, which is exactly when they are easiest to act on and hardest to take seriously.
You cannot actually do this with a real sheet of paper. Each fold halves the surface area while doubling the thickness, so the paper very quickly needs to be longer than it is wide by an enormous factor. The common claim was that seven or eight folds is the limit, but in 2002 an American high school student named Britney Gallivan derived the mathematics of the folding limit and then folded a single sheet of tissue paper twelve times, using a roll about 1,200 metres long.
So the number is real and the physical act is not. The thickness genuinely doubles, but the paper required to keep folding grows faster than any sheet you could manufacture.
Size of Life zooms from atoms to galaxies, Spend Bill Gates' Money does the same thing with money, and Time Left does it with a lifespan. All free, all in the browser, nothing stored.
About 42 folds. A 0.1mm sheet doubling each fold passes 440,000km at fold 42, which is roughly the distance to the Moon.
No. Each fold halves the surface area, so the sheet needs to be impossibly long. In 2002 a high school student named Britney Gallivan worked out the mathematics of the folding limit and then folded a single sheet of tissue paper twelve times using a roll about 1,200 metres long.
Around 30 folds gets you to roughly 107km, which is past the Kármán line, the commonly used boundary of space at 100km.
Human estimation is roughly linear, so we are good at adding and poor at compounding. The classic illustration is the chessboard, where one grain of rice doubling each square exceeds all the rice ever grown by square 64.
About 103. The final few folds each add more distance than every fold before them combined, which is what makes the sequence feel impossible.
Yes, with no sign-up and nothing to install.
Yes. The daily gives everyone the same board, generated from the date, and it resets at midnight UTC. Your result is recorded and the strip above the game shows your last seven days and your current streak. Nothing is sent to a server, so the streak lives on your own device.