The blue whale, the worlds largest animal at 110 feet according to guiness world records eat krill, which are shrimp-like crustaceans only about an inch-and-a-half long.
Pick on somebody your own size? Not whales! An adult whale might slaughter 40 million, or 4-6 tons of these little creatures in one day!!
Amazingly, the krill population persists, but you have to assume this perpetual atrocity affects the krills ability to develop a stable society.
The rule of 72 is used to find the number of years it takes to double your money at a given interest rate.
(72/[interest rate]) = years until a principle doubles
So, how long will it take to double your money at eight percent interest? Divide 8 into 72 and you get 9 years.
If you collect 7% on your savings in a little over 10 years the amount will be double what it is today.
The rule of 72 also means that you can determine the time
it takes for a population to double if it is growing at a steady rate by solving this function:
(72/[rate of growth]) = years for population to double
South America has an area of 17,840,000 km² (6,890,000 sq mi), or almost 3.5% of the Earth's surface. South America ranks fourth in area (after Asia, Africa, and North America) and fifth in population (after Asia, Africa, Europe, and North America)
US forces fire bombed japan's wooden cities totally destroying 58 % of Yokohama (the size of Cleveland)
51% of Tokyo (new York) 99% Toyama (Chattanooga) 40% Nagoya (LA) killing 50-90% of the population in 67 Japanese cities BEFORE two nuclear bombs were dropped.
The British Shorthair population dropped sharply during WWII, and breeders afterward crossed them with Persians and other breeds to rebuild their numbers.
The international trade in elephant ivory was banned under the CITES treaty in 1989 after poaching cut Africa's elephant population roughly in half during the 1980s.
Przewalski's horse is a rare, stocky horse from Mongolia, often called the last truly wild horse. It went extinct in the wild and was successfully reintroduced from zoo populations.
The red wolf is one of the world's most endangered canines, and only a small population of fewer than about 30 survives in the wild in eastern North Carolina.