How long have sharks been in the ocean?

How long have sharks been in the ocean?

Sharks have swum in the oceans for almost 450 million years. But longevity is only part of the story. That extra few million years of evolution have enabled many shark species to develop some extraordinary abilities as perfect predators.

What tree bark does aspirin come from?

But even if the FDA does decide to pull aspirin from the shelves, you don’t have to go to a store to get more of this stuff. You may, however, have to take a trek into the woods. Early incarnations of the compound were made by boiling the bark of the white willow tree.

How long do astronauts stay in quarantine?

NASA transported them to Houston, quarantine trailer and all, and they emerged from isolation three weeks later. (Nowadays, astronauts returning from space exit their spacecraft almost immediately, though some long-duration astronauts receive medical checks after spending months in weightlessness.)

Why do you hear the ocean in a shell?

There is a popular folk myth that if one holds a seashell—specifically, most often, a conch shell—to one’s ear, one can hear the sound of the ocean. The rushing sound that one hears is in fact the noise of the surrounding environment, resonating within the cavity of the shell.

Can frogs throw up?

It was discovered on a space mission that a frog can throw up. The frog throws up its stomach first, so the stomach is dangling out of its mouth. Then the frog uses its forearms to dig out all of the stomach’s contents and then swallows the stomach back down.

What is the highest IQ ever recorded?

William James Sidis is alleged to have had an IQ of 275. With an IQ between 250 and 300, Sidis has one of the highest intelligence quotients ever recorded. Entering Harvard at the age of 11, he was fluent in more than 40 languages by the time he graduated and worked his way into adulthood.

What were the wisdom teeth used for?

Anthropologists believe wisdom teeth, or the third set of molars, were the evolutionary answer to our ancestor’s early diet of coarse, rough food – like leaves, roots, nuts and meats – which required more chewing power and resulted in excessive wear of the teeth.

What does the MI in mi5 stand for?

“MI5/MI6” were the original designations when both organisations came under the War Office, now the MOD – “MI” stands for military intelligence. Their official names (acquired in the 30s) are the Security Service (MI5) and SIS, the Secret Intelligence Service (MI6).