Modern humans walked the Earth over 200,000 years ago, but we still do not know many of the secrets of the planet. However, below you can find 9 simple facts that you can remember and amaze everyone around you.
The spider web is stronger than steel

The spider web is stronger than steel because of its resistance to deformation and its elasticity. The mesh can be stretched 2-4 times its size without being detached because it possesses the best characteristics of steel and rubber.
Owls have no eye cavities

Owls have tubes or cylinders so their eyes remain motionless. They are held by the bony structures of the skull, even their eyes can be seen through the ears.
Frogs have teeth

Carnivorous frogs have teeth on both their jaws. the teeth are small, no more than half a millimeter, conical in shape and alternate constantly.
Whales sleep vertically

Whales do not move during their sleep in the vertical position. It is believed that they sleep with one eye half open and a part of their brain stays awake. It is mammals that sleep less, only 10-15 minutes a day.
Apples, potatoes and onions taste the same

It may not look like that at all, but if you close your nose and try them, you can not tell. Also, onions promote sleep as they reduce stress and lower blood pressure. However, for some people it can cause heartburn.
Otters catch their paws when they sleep

When the flow of the river begins to accelerate, the otters catch their paws with each other during sleep so that they do not separate. Men thus catch their wives to show others that she belongs to him.
Woodpeckers have long tongues

Indeed, the tongue of a woodpecker is so long that it can be tied around its head, ranging from 15-35 cm. It lies between the eyes and the nostrils, gathers behind the skull and helps protect the brain by reducing friction.
Horses can see almost 360 degrees

The location of their eyes on the side of the head gives them such a wide field of view. Separately, they do not have any difficulty in seeing what is behind them, but it also helps the size of the eye, which is the largest among mammals of the head and height.
Pigeons produce fake milk

Since they have no mammary glands, they produce 'vegetable milk'. It is stored in a bag in the throat of adults and is very nutritious for young.