Science

They are: Basal tears (protecting and nourishing cornea) Reflex tears (glands' reaction to irritating compounds, like smoke) Emotional tears (produced in response to various emotional states)

Temperatures there dropped to – 30 degrees Celsius, and up to 180 centimeters of snow fell in most o ...

However, it becomes dull upon contact with ozone, hydrogen sulfide, and air polluted with sulfur compounds. Silver halides slowly decompose when exposed to light.

An example of such a mushroom is the oyster mushroom. When it lacks protein, it hunts nematodes by f ...

While its surface may be barren, it is likely that beneath its icy surface there may be an ocean tha ...

But already in the first decade of the 21st century, this view was questioned and a debate began among scientists about its carcinogenic properties.

This theory assumes that the universe began at a single point the size of a pinhead, which, as a res ...