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Many things can create one, ...

Many things can create one, it can be of any shape or size, it is created for various reasons, and it can shrink or grow with time. What is it?

Correct answers: 34

The first user who solved this task is Chandu Rajyaguru.

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Hunting Elephants

I hate it when people see me at the super market & they are like: Hey what are you doing here? And i'm just like: “Oh you know, hunting elephants.”

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Donald R. Griffin

Born 3 Aug 1915; died 7 Nov 2003 at age 88. Donald Redfield Griffin was an American biophysicist, known for his research in animal navigation, animal behaviour, and sensory biophysics. With Robert Galambos, he studied bat echolocation (1938), a term he coined (1944) for how the bat's ears replace eyes in flight guidance. Using specialized high-frequency sound equipment by G.W. Pierce, they found that bats in flight produced ultrasonic sounds used to avoid obstacles. In WW II, he used physiological principles to design such military equipment as cold-weather clothing and headphones. Griffin also worked extensively on bird navigation. In the late 1940s, he flew in a Piper Cub to observe the flight paths of gannets and gulls. In his career, he pioneered rigorous techniques to study animals in their natural environment.«

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