A blue whale calf gains 1 kg per hour during its first 2 weeks because of the fatty milk. The milk consists of 96% fat.
How much sperm does a blue whale release?
A blue whale releases about 400 liters of sperm at a time. Only 40 liters end up in the female whale.
How do whales sleep?
Whales sleep with one half of the brain at a time. This means there is always an awake half to take care of things like breathing.
