Nepal is the only country in the world whose flag is not square or rectangular shaped.

One inch of rain over one square mile is 17,378,700 gallons of water.

Scratch-and-sniff works by taking the aroma-generating chemical and encapsulating it in gelatin or plastic spheres that are a few microns in diameter. When you scratch the sticker, you rupture some of these spheres and release the smell.

80% of all the diamonds mined every year (equal to about 100 million carats or 20,000 kg) are unsuitable for use as gemstones, and are destined for industrial use. In addition to mined diamonds, synthetic diamonds found industrial applications almost immediately after their invention in the 1950s; another 400 million carats (80,000 kg) of synthetic diamonds are produced annually for industrial use. This means the amount of synthetic diamonds used per year is approximately four times the amount of natural diamonds mined over the same period.

The 1883 eruption of Krakatoa ejected more than six cubic miles of rock, ash, and pumice into the atmosphere, and generated the loudest sound ever historically reported the cataclysmic explosion was distinctly heard as far away as Perth in Australia (approx. 3100 km/1900 mi), and the island of Rodrigues near Mauritius (approx. 4800 km/3000 mi). Atmospheric shock waves reverberated around the world seven times and were felt for five days. Waves from the tsunamis were recorded as far away as the English Channel.