History Misc Musings

How did Inflatable Tanks Fool the Nazis?

inflatable tank

During the Second World War the allies used various tricks and deceptions to fool the Nazi’s. One of these deceptions was quite elaborate and involved inflatable tanks, sound trucks and fake radio transmissions. This was known as the Ghost Army.

The purpose of the Ghost Army was to deceive and befuddle the Germany army in the weeks leading to the D-Day landings. The unit, known as the 23rd Headquarters Special Troops, put on a travelling road show throughout France.

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Misc Musings

When Tattoos are Lasered off They are Excreted by the Wearer

Tattoo Artist

Tattoo inks are made of compounds from heavy metals such as lead, copper and zinc. The metals in ink is what enables tattoos to last so long. The ink is injected into the deeper, second level of the skin called the dermis. However, tattoos are not simply erased in the same way you would rub pencil away from a piece of paper.

When someone gets a tattoo, white blood cells immediately start to try and remove them, however the ink particles are larger than the white blood cells and so they cannot break them down.

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Animals Planet Earth

Poison Dart Frogs are no Longer Poisonous in Captivity

frog

One of the most poisonous animals on Earth is the Poison Dart Frog. While only around 5cm long, the Poison Dart Frog has enough venom to kill 10 adult humans. Two micrograms of their toxin (an amount that would fit on the head of a pin) would be enough to kill a person.

The indigenous people of South America used their toxin to poison the tips of their blow darts which would kill any animal or person it hit. However, when kept in captivity the poisonous nature of the frog completely disappears.

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Animals Food Misc Musings

Inside Every Fig is a Dead Wasp

figs

Figs are not technically a fruit, they are actually more like an inverted flower. These are known as a syconium where flowers and seeds are borne. Due to the fact that the flower is inverted, most pollinating insects cannot get to the pollen. Without pollination the fig tree wouldn’t be able to reproduce.

This is where the fig wasp comes into play. The fig tree and the fig wasp (Blastophaga psenes) have evolved a mutual relationship. The fig tree can only be pollinated with the help of the fig wasp and the fig wasp can only reproduce inside a fig syconium.

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Animals

Slugs Have 27,000 Teeth

Slug

There are around 30 different species of slug in the UK, which provide a  food source for other predators such as birds, hedgehogs and even toads. Slugs have an important role in the ecosystem and are key composters which help to break down decomposing vegetation. However they are notorious for being able to chomp through garden plants and vegetables in a very short period of time. They do this using their teeth!

Slugs average approximately 27,000 ‘teeth’. They need so many teeth  because instead of chewing their food, they have a ribbon-like flexible band of microscopic teeth called a radula. This acts like a circular saw — cutting through vegetation and eating it as they go. When their teeth wear out new rows of teeth move forward and replace them.

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Animals

Dolphins Sleep with One Eye Open

dolphin.jpg

Dolphins 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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Misc Musings Planet Earth

You Would Not Sink in Lava

Golum in Lava

Contrary 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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Animals History

Pablo Escobar’s Bloat of Hippos

pablopotamus

When 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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Misc Musings

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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