Your thumb is about the same size as your nose.
124
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
A person can live without food for about a month, but only about a week without water.
156
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55