How long have alligators been on the earth?

How long have alligators been on the earth?

Crocodiles are the ultimate survivors. Having arisen some 200 million years ago, they have outlived the dinosaurs by some 65 million years. Even humans, the most fearsome predators ever to stalk the Earth, have failed to force into extinction any of the 23 species of crocodilians.

How long is a nanosecond?

A nanosecond (ns) is an SI unit of time equal to one billionth of a second (10−9 or 1/1,000,000,000 s). One nanosecond is to one second as one second is to 31.71 years. The word nanosecond is formed by the prefix nano and the unit second. Its symbol is ns.

How many different smells can your nose remember?

Your nose can smell at least 1 trillion scents. Scientists had long assumed our noses could distinguish about 10,000 odors. (TIME.com) — Human beings tend to think of themselves as visual first, auditory second, then touch and taste.

How many times is scotch distilled?

Traditionally, the Scotch whisky is distilled twice and the Irish whiskey three times. For this reason, the Irish claim their whiskey is a smoother and purer whiskey.

Who became the first Roman Emperor?

Following the Battle of Actium in 31 BCE, Gaius Octavian Thurinus, Julius Caesar’s nephew and heir, became the first emperor of Rome and took the name Augustus Caesar.

When was the first leap year?

The first leap year. The first leap year in the modern sense was 1752, when 11 days were ‘lost’ from the month September with the adoption of the Gregorian calendar by Britain and her colonies.

Who was the chief author of the Declaration of Independence?

Thomas Jefferson (1743-1826)—Thomas Jefferson was the chief author of the Declaration of Independence.

What height to reach terminal velocity?

A falling person will reach terminal velocity after about 12 seconds, falling some 450 m (about 1,500 ft) in that time. That person will not then fall any faster, so it makes no difference what distance they fall if it is more than 1,500 ft – they will still reach the ground at the same speed.