Vitamin D deficiency is associated with increased risk of multiple sclerosis, depression, and autoimmune disease.

Lightning is hotter than the Sun.

Fact #1698 · Science

The human brain operates on about 20 watts of power.

Fact #1765 · Science

X-rays were discovered in 1895 and transformed medical imaging.

Fact #1194 · Science

Volcanic eruptions can produce lightning within ash clouds.

Fact #844 · Science

Water is composed of two hydrogen atoms and one oxygen atom.

Fact #41 · Science

Nothing can travel faster than light in a vacuum.

Fact #1777 · Science

The Earth's inner core is primarily iron and nickel.

Fact #150 · Science

The Harlow monkey experiments studied attachment and maternal bonding.

Fact #996 · Science