A cloud in the middle of a room.

Pangea with current countries

Image from: http://9gag.com/gag/aeNNL3O

The giant squid.

Luckily, it has razor sharp teeth to properly chew its meals.

It also has the largest eyeball in the animal kingdom, measuring up to 25 cm (10 inches).

Why is a cat's tongue so rough?

Have you ever wondered why a cat's tongue feels so rough? Check out this close up shot.

A cat's tongue is covered in backwards facing spines, about 500 microns long. These are called papillae and they contain keratin (the same stuff your fingernails and hair is made of) making them quite rigid. These are used in grooming and act almost like a hairbrush.

I won't show you a photo of this, but a cat's tongue isn't the only body part to have spines. The penis has a band of about 120–150 backwards-pointing penile spines, which are about one millimeter long. These rake the inside of the females vagina, triggering ovulation.
So there you go. Now you know why a cat's tongue feels like sandpaper, and why female cats make such a loud noise when mating!

What is a Theory?

Definition of a scientific theory: a well-substantiated explanation of some aspect of the natural world, based on a body of knowledge that has been repeatedly confirmed through observation and experiment.

Other modern scientific theories: germ theory, theory of relativity, heliocentrism, atomic theory, plate tectonics, and cell theory.

PS Yes, gravity is a theory. Look up "the theory of gravity" and "Newton's Law Of Gravitation". Also, a theory never becomes a law.

Argentavis; the biggest bird that ever lived.

Argentavis lived approximately 6 million years ago in Argentina. According to current estimates, it had a wing span of 7 metres.

Science of Sandcastles

Sandcastles can be an art form, but there actually is a lot of science behind them. When making a sand mixture, it must be (by volume) 99% dry sand, 1% water. If you add much more water than that, you’ll be in danger of creating landslides. Essentially, you want just enough water so that capillary bridges hold the grains of sand together.

How well does this work? The researchers were able to make a cylinder 7 centimeters in diameter that stood 60 centimeters high!

More info: http://bit.ly/19DSu5g