In the middle of the night on July 16 in the city of Turfan, China, bolides fell from the sky.

A bolide is normally taken to mean an exceptionally bright meteor, but the term is subject to more than one definition, according to context. It may refer to any large crater-forming body, or to one that explodes in the atmosphere. It can be a synonym for a fireball, sometimes specific to those with an apparent magnitude of −14 or brighter. Astronomers tend to use bolide to identify an exceptionally bright fireball, particularly one that explodes (sometimes called a detonating fireball)

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Francesco Hayez – Self-portrait with Tiger and Lion (c. 1830)

Francesco Hayez 10 February 1791 – 12 February 1882) was an Italian painter. He is considered one of the leading artists of Romanticism in mid-19th-century Milan, and is renowned for his grand historical paintings, political allegories, and portraits.

Something just blew up at the Hoover Dam

Storm (1925) - Zdzisław Jasiński

The alchemy symbol for tin is more ambiguous than others, probably because tin is a common silver-colored metal. The symbol looks like the number four, or sometimes like a seven or letter "Z" crossed with a horizontal line.

The alchemy symbol for the metal antimony is a circle with a cross above it. Another version seen in texts is a square placed on edge, like a diamond.

Antimony was also sometimes symbolized by the wolf—the metal represents man's free spirit or animal nature.

A wide variety of seemingly unrelated symbols were used to represent the element arsenic. Several forms of the glyph involved a cross and two circles or an "S" shape. A stylized picture of a swan was also used to represent the element.

Arsenic was a well-known poison during this time, so the swan symbol might not make much sense—until you recall that the element is a metalloid. Like other elements in the group, arsenic can transform from one physical appearance to another; these allotropes display different properties from each other. Cygnets turn into swans; arsenic, too, transforms itself.

The alchemy symbol for platinum combines the crescent symbol of the moon with the circular symbol of the sun. This is because alchemists thought platinum was an amalgam of silver (moon) and gold (sun).

Alchemists were fascinated by phosphorus because it seemed capable of holding light—the white form of the element oxidizes in air, appearing to glow green in the dark. Another interesting property of phosphorus is its ability to burn in air.

Although copper was commonly associated with Venus, the planet was called Phosphorus when it glowed brightly at dawn.

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