What city has been hit by the most tornadoes?
Oklahoma City has been hit by a staggering 100 tornadoes; the earliest recorded tornado there was in 1893. The most-hit city count can change based on how city limits are defined, but when considering a 20-mile radius around a city of 100,000 or more, Oklahoma City is in the lead, followed by Huntsville, Ala.
What year was the ballpoint pen invented?
It was a familiar frustration that led to the invention of the modern ball-point pen - leaky ink. In 1938, Hungarian newspaper journalist Laszlo Biro noticed the ink used on the printing presses dried quickly and so tried using it in a fountain pen to avoid the problem of leaks, blots and smudges.
How are comets and asteroids different?
Asteroids are made up of metals and rocky material, while comets are made up of ice, dust and rocky material. Both asteroids and comets were formed early in the history of the solar system about 4.5 billion years ago. Asteroids formed much closer to the Sun, where it was too warm for ices to remain solid.
Are deer color blind or not?
"Deer are essentially red-green color blind like some humans. Their color vision is limited to the short and middle wavelength colors. As a result, deer likely can distinguish blue from red, but not green from red, or orange from red."