Not swinging your arms when you walk increases the effort of walking by 12%, the equivalent of walking 20% faster or carrying a 10 kg backpack.
12
Pollen never deteriorates. It is one of the few natural substances that lasts indefinitely.
58
The mile is Latin for 1,000. The number of paces it took the average Roman!
36
Sunflowers can be used to clean up radioactive waste.
17
Passengers on the Beijing subway can pay with plastic bottles.
29
Women blink nearly twice as much as men.
152
