Science

Astronauts can not cry in space

The tail of a comet always points in the opposite direction to the sun

The brain contains 86 billion nerve cells joined by 100 trillion connections

It takes a photon, on average, 170,000 years to travel from the heart of the sun to the surface

At least 2700 enzymes are active in the human body

On Jupiter and Saturn it’s raining diamonds

Russia has an area larger than Pluto

Only one satellite was destroyed by a meteor

The continents move at about the same rate as your nails grow

We only saw 5% of the universe from the earth