The first hand-held mobile telephone call was made on April 3, 1973 in New York City.

King Henry VIII of England had servants called "Grooms of Stool." 

These servants wiped him clean after he visited the toilet.

Owls do not have eyeballs in the traditional sense; instead, they have eye tubes or cylinders that are elongated and do not move in their sockets like human eyeballs do. This unique eye structure allows owls to have large eyes relative to their body size.  This helps owls see in low light conditions.

Because their eyes are fixed in their sockets, owls must rotate their heads to look around.
They are capable of turning their necks up to 270 degrees.

A flat 4 engine (or 6, 8 cyl) is called a boxer as the opposing pistons look like boxers fighting.

An octopus has three hearts.

Sometimes an octopus will eat another live octopus.

The heart of a shrimp is in its head.

Beware!  The box jellyfish is considered to be the most venomous animal in the world. Its sting may cause heart failure and death within minutes.  Stay away!

The dung beetle is one of the strongest animals in the world.  It is capable of pulling over 1,100 times of its own body weight.

The dung beetle is an animal, belonging to the kingdom Animalia and is classified under the order Coleoptera, which includes beetles.

The name LEGO comes from the Danish words "Leg Godt," and that means "play well."

The number four (4) is the only number with the same number of letters as its numeric value.

Wearing headphones for just an hour could increase the bacteria in your ears by 700 times.

Clean your headphones and your ears!

Camels have three eyelids.

If you are under the moon that is directly overhead, you will weigh slightly less.

A 50kg (around 110 pounds) person would weigh approximately 0.24g (around 1/2 pound) lighter.

Wood pellets can be made of sawdust and wood chips, wood shavings, small logs, and other wood waste.

Cocoa trees come in various varieties.  Their fruit are in big pods, which can be about the size of footballs.  Opening the pods and you find edible pulp and the cocoa beans.  These trees grow in tropical areas.

It takes about 300-600 cocoa beans to make about one kilogram of chocolate.

Solid chocolate started to be produced in the mid 19th century.

Heather gems are not made of stone but rather wood from a plant called heather.
The wood is stained different colors.

This can make for nice jewelry.  A Scottish firm makes them.

They can look like stone.

The ancient Romans typically heated the floors of their bathrooms.