When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Billions of neutrinos pass unnoticed through your body every second.
6
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Most dust particles in your house come from dead skin.
48
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The left ear is more responsive to words of love and emotion whispered into it than the right.
40