Olympic Gold Medals only contain 1.34% of gold.
The world's largest gold bar weighs 250 kg (551 lb).
In 1984, McDonald's ran a campaign that gave customers a chance to win a free Big Mac every time the U.S. won a gold medal. The U.S. won a shocking 83 gold medals, costing McDonald's millions of dollars in lost profits. Here are more mind-blowing facts you never knew about McDonald's.
Gold has been discovered on every continent on earth.
Gold is edible.
Our bodies contain about 0.2 milligrams of gold, most of it in our blood.
Earthquakes turn water into gold.
The world's oceans contain nearly 20 million tons of gold.
Carat weight can be 10, 12, 14, 18, 22, or 24. The higher the number, the greater the purity.
A ton of iPhones yield 300 times more gold than a ton of gold ore.
24k Gold melts at 1063°C or 1945°F.
NASA estimates that the near-Earth asteroid, Eros, contains 20 billion tons of gold.
Nearly half the gold ever mined has come from one place: Witwatersrand, South Africa.
About one-fifth of all the gold held by the world's governments, worth about US$248 billion, is stored beneath the streets of London.
There is enough gold in Earth's core to coat its entire surface to a depth of 1.5 feet.
Aurophobia is the fear of gold.
Indian housewives hold 11% of the World's Gold. That is more than the reserves of the U.S., IMF, Switzerland and Germany put together.
McLaren F1's engines are built with gold.
Injecting gold into the body can help fight cancer.
Alchemist Hennig Brand believed that he could distill gold from human urine. After stockpiling 1,500 gallons of urine and boiling it, he discovered phosphorus.
There are 52,000 tonnes of minable gold still in the ground worth US$2 trillion.