The lifespan of mammals is about 1 and a half billion heartbeats.
127
If you had 10 billion $1 notes and spent one every second of every day, it would require 317 years for you to go broke.
109
Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
22
While pumpkins are typically orange, they can also be green, white, red, gray, and even blue.
15
American school children rank 25th in math and 21st in science out of the top 30 developed countries, but ranked 1st in confidence that they outperformed everyone else.
7
Sheep, goats, octopuses, and toads have rectangular pupils.
7
If you are cold you are more likely to be hungry because you use energy to keep warm.
144