On average, there's 300 billion neurons in the octopus brain.
129
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
The desire to squeeze and hug cute things comes from the same place in your brain as aggression.
65
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The elephant brain weighs about 6,000g.
274
Starfish don't have brains.
132