Mercury (Hg) and bromine (Br) are the only elements in the periodic table that are liquids at room temperature.

The average moderately active person takes about 7,500 step per day. If you maintain that daily average and live until 80 years of age, you'll have walked about 216,262,500 steps in your lifetime -- the equivalent of walking about 5 times around the Earth.

Solid krypton is white and has a face-centered cubic crystal structure.

Howard Carter became world-famous after discovering the intact tomb of the 18th Dynasty Pharaoh, Tutankhamun.

The brains of most species of Australopithecus were roughly 35% of the size of a modern human brain.

At room temperature lithium is a soft, silvery-white metal. It is the least dense of the solid elements and is the lightest of all the metals.

Feynman once predicted that number 137 defines the table's outer limit. He believed that adding any more protons would produce an energy that could be quantified only by an imaginary number, rendering element 138 and higher impossible.

The liver is the only organ that can regenerate itself thus making it possible for one person to donate part of their liver to another person. When a portion of the liver is transplanted, the donor's liver will regenerate back to its original size while the transplanted portion will grow to the appropriate size for the recipient

Einstein's famous equation shows that the increased relativistic mass (m) of a body comes from the energy of motion of the body--that is, its kinetic energy (E)--divided by the speed of light squared (c²).

Each of your lungs contains about 300 million balloon-like structures called alveoli, which replace the carbon-dioxide waste in your blood with oxygen.