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
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
The adult human brain weighs about 3 pounds (1,300-1,400 g).
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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
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.
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