The phenomenon of 'tip of tongue' — knowing a word exists but not retrieving it — reveals how memory is organized.

Bees have five eyes.

Fact #356 · Human Body

Multitasking often reduces overall task performance.

Fact #950 · Human Body

The Olympic Games are held every four years.

Fact #923 · Human Body

The Earth is slightly flattened at the poles.

Fact #131 · Human Body

Smiling can influence mood through feedback to the brain.

Fact #951 · Human Body

The human heart beats over 100,000 times per day on average.

Fact #22 · Human Body

Hyenas have powerful jaws adapted for crushing bone.

Fact #1274 · Human Body

The first successful kidney transplant occurred in 1954.

Fact #1221 · Human Body