What year was the ballpoint pen invented?

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 many dots are there on a golf ball?

The dimples are usually the same size as one another, but some golf balls have several different sizes of dimple on the same ball. Any number between 300 and 500 dimples is reasonable, and 336 is a common number.

How fast is light in miles per second?

The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.

When did the elephant bird become extinct?

Madagascar’s giant, flightless elephant birds were once a common sight on the island, certainly up until the 17th century. It is generally believed that the elephant bird’s extinction resulted from human activity, perhaps not surprising when one of their giant eggs would have fed an entire family.

How is root beer made?

Common ingredients in root beer include vanilla, cherry tree bark, wintergreen, molasses, anise, liquorice root, cinnamon, and honey among others. The primary ingredient is still sassafras flavour. Root beer is almost exclusively a North American drink.

What type of car was used in Back to the Future?

The DeLorean DMC-12 (commonly referred to simply as the DeLorean as it was the only model ever produced by the company) is a sports car manufactured by John DeLorean’s DeLorean Motor Company for the American market in 1981–83.

How many episodes are there of The Price Is Right?

While retaining some elements of the original version of the show, the 1972 version added many new distinctive gameplay elements. Taped at CBS Television City in Los Angeles, The Price Is Right has aired over 7,500 episodes since its debut and began its 42nd season on September 23, 2013.

How do lobsters communicate with each other?

Lobsters communicate with each other by peeing at one another. Lobsters have bladders on each side of their heads, so when they want to let another lobster know they’re angry, sad, happy, or interested in being more than friends, they pee.