Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
In one day, adult lungs move about 10,000 litres of air.
11
If Earth's history was condensed into twenty-four hours, life would've appeared at around 4am, land plants at 10:24pm, dinosaur extinction at 11:41pm, and human history would’ve began at 11:58:43pm.
21
Caffeine boosts memory.
405
Any domino can knock over another object up to 1.5x its size. The 32nd object would be big enough to knock over the Empire State Building.
18
A comet's tail always points away from the sun.
2