When was the current American flag made?

When was the current American flag made?

Two years after he made it, and just one year after the 49 star flag was adopted thanks to the addition of Alaska in January, 1959, Heft’s 50 star flag was made the official U.S. flag design on July 4th, 1960 with Hawaii becoming a U.S. state on August, 1959.

Why are icebergs made of fresh water?

True icebergs are galcier fragments that have fallen into the sea. Glaciers are made of compacted smow, which is fresh water. Additionally, “sea ice” that forms from the freezing of sea water is also basically fresh water as well. This is because when saltwater freezes, it excludes salt from the ice crystal lattice.

Who invented the electric light bulb in 1879?

1879: Thomas Edison crowns 14 months of testing with an incandescent electric light bulb that lasts 13½ hours. Sir Humphry Davy had produced incandescent electric light in 1808 by passing battery current through a platinum wire. But the voltaic pile was expensive and could be messy.

What is John Hancock famous for?

Born on this day in 1737, John Hancock is most famous for his bold signature. On August 2, 1776, he was the first member of the Continental Congress to sign the Declaration of Independence, the document first demanding independence for the United States from the rule of Great Britain.

Who has stayed awake the longest?

Randy Gardner is the holder of the scientifically documented record for the longest period a human has intentionally gone without sleep not using stimulants of any kind. In 1964, Gardner, a 17-year-old high school student in San Diego, California, stayed awake for 264.4 hours (11 days 24 minutes).

Who has the most patents?

List of prolific inventors. Thomas Edison was widely known as the world’s most prolific inventor. He held a total of 1,093 U.S. patents (1,084 utility patents and 9 design patents). In 2003, he was passed by Japanese inventor Shunpei Yamazaki.

Why do they call it a fortnight?

A fortnight is a unit of time equal to 14 days (2 weeks). The word derives from the Old English: fēowertyne niht, meaning “fourteen nights”.

How many shipwrecks are on the ocean floor?

The United Nations estimates that there are over three million shipwrecks on the ocean floors. Lost, destroyed, or deliberately sunk, these wrecks are of interest to divers, underwater archaeologists, and treasure hunters alike.