ArcaMax

Knowledge

on May 17, 2025

Collagen
Elastin
Keratin
Lecithin

Keratin. A rhinoceros's horn is made of keratin.

Science Trivia / May 16, 2025

0.00%. Scientists believe the Earth is 4.56 billion years old.

Science Trivia / May 16, 2025

Nimbus. Clouds are classified according to their height and appearance.

Science Trivia / May 15, 2025

Precipitation. Drizzle, rain, snow and sleet are several of the different forms of precipitation.

Science Trivia / May 15, 2025

Great Barrier Reef. Australia's Great Barrier Reef can be seen from outer space.

Science Trivia / May 14, 2025

88 Feet. Sixty miles per hour is about the same speed as 52 knots per hour.

Science Trivia / May 14, 2025

Francis Crick. Francis Crick was a molecular biologist, biophysicist, and neuroscientist.