A single tree can absorb about 48 pounds of carbon dioxide per year.

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

Fact #150 · Science

The Earth's atmosphere blocks much of the Sun's harmful radiation.

Fact #113 · Science

The Earth's outer core is liquid metal.

Fact #250 · Science

Volcanic eruptions can produce lightning within ash clouds.

Fact #844 · Science

The development of anesthesia made complex surgery possible.

Fact #1190 · Science

Insulin was first used to treat diabetes in the early 1920s.

Fact #1189 · Science

Practice can strengthen neural pathways in the brain.

Fact #968 · Science

The Earth's atmosphere is composed mostly of nitrogen and oxygen.

Fact #80 · Science