Hearing is the fastest human sense. A person can recognize a sound in as little as 0.05 seconds.
Your brain generates enough electricity to power a lightbulb.
It takes less than 1 minute for blood to travel all around your body.
Blood is six times thicker than water.
Mercury is the only metal that is liquid at room temperature.
The flag of Mars is a tricolour used by the Mars Society and The Planetary Society to represent the planet Mars.
Bacteria, the tiniest free-living cells, are so small that a single drop of liquid contains as many as 50 million of them.