Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
It takes approximately 12 hours for food to entirely digest.
93
On average, there's 100 billion neurons in the human brain.
83
The human brain has the capacity to store everything that you experience.
4k
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
The average sperm cell swims at 8 inches per hour.
4