Facts
- Giraffes only need 5-30 minutes of sleep in a 24-hour period.
- Elephants can recognize themselves in a mirror - a sign of self-awareness.
- Octopuses have three hearts and blue blood.
- Dolphins have name for one another and can call each other by a unique whistle.
- Sea otters often hold hands when they sleep.
- Cheetahs are the fast land animals, running up to 80mph.
Photo by Niels Baars on Unsplash