Lobsters have blue blood.
476
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
476