Dolphins Sleep with One Eye Open

dolphin.jpgDolphins and whales often sleep with one eye open in order to avoid being eaten by sharks. The ability to stay partially conscious also allows them to continue to get air while sleeping.

How dolphins handle this is to put one half of their brain to sleep, while the other half is still conscious and functioning.  They then alternate which side is sleeping periodically. They stay in this state for approximately eight hours a day.  Doing this allows them to be conscious enough to control their breathing and periodically swim to the surface and get air, while still giving their brain the rest it needs.

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The World’s First Farmers

antsThese are Leafcutter Ants, a name given to over 47 species of ant which are native to the tropical rainforests of South America.

They cut up leaves and carry bits of them back to their nest, the obvious reason for this might be that they eat the leaves, but what actually happens is a bit more interesting.

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You Would Not Sink in Lava

Golum in LavaContrary to what you might have seen in movies, if you jumped into lava you would not sink. Lava is nothing like water. Lava is a term used for molten rock on the surface of the earth and is incredibly dense, over 3 times the density of water.

Water has a density of 1000 kg/m3 and Lava has a density of 3100 kg/m3

Humans have a density of around 1010 kg/m3 which is very similar to water and this is the reason that we can float and not sink in water. However lava has a density much higher than our own so we would not sink or float, we would be stuck on the surface.

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Pablo Escobar’s Bloat of Hippos

pablopotamusWhen he died in 1993, Pablo Escobar was one of the wealthiest men in the entire world. He made Forbes’ list of international billionaires for seven years straight. His drug empire was worth an estimated $30 billion and, by the end of the 80’s, he supplied 80% of the worlds cocaine.

With this wealth he owned an estate in Antioquia in Columbia. This estate held a private airport, a bullring, a cart racing track, sculpture garden, a collection of dinosaur skeletons and a private zoo filled with various exotic animals including elephants, zebras, giraffes and four hippos, three females and one male.

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You Can’t Smell Gas

gas_flame

Natural Gas is odorless. It is comprised mainly of methane which does not smell, however when you turn on the gas on your stove it gives off a very strong stench!

This is because of a chemical known as Mercaptan (also known as Thiol). This is added to Natural gas in order to make it smell! It is a harmless gas which is a waste product of normal metabolism and is found naturally in living organisms.

The chemical features very few useful qualities, bar one, it gives off an incredibly pungent smell. Even in the smallest quantities the human nose can still detect it. It is the world’s smelliest substance and is unbearable in its concentrated form.

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Why are Flamingos Pink?

FlamingosFlamingos are one of the most iconic creatures in the animal kingdom, easily identified by their bright pink plumage. However when Flamingos were first brought to zoos from the wild, the keepers were dismayed to find they lost their bright pink colour and turned a grey/white shade.

It turns out the secret to the flamingo’s pink feathers comes from their diet. In the wild flamingos eat algae and invertebrates that contain things called carotenoids. Carotenoids contain pigments which dissolve in the flamingos fats and are then deposited in the growing feathers of the flamingo giving them their colour. If this is removed from the diet of the flamingo then the colour will be lost and feathers come through as their natural grey colour.

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The Misinformed Mongoose Invasion of Hawaii

145359In Hawaii in the 1800’s the sugar industry was facing problems from the growing rat population which was eating through their sugar plantations and costing them a lot of money. In order to try and control the rat population, a predator was introduced to the islands, in 1833 Mongooses, which are originally native to India, were let loose in the fields of Hawaii to end the rat threat to the agriculture.

However this decision seemed to be incredibly misinformed, rats are a nocturnal animal which means they are only active at night and spend the days hidden away in nests, however the Mongoose is diurnal, which means they only hunt in the daytime and nest at night so the two animals would never encounter each other!

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