Science

Its age is estimated at 13.6 ± 0.8 billion years, so it may be only 100 million years younger than the Universe.

Dry eye syndrome is caused by insufficient quantity or quality of tears, which prevents the proper lubrication of eyeballs. It causes excessive watering of the eyes, as a response to the irritation.

It launched a total of 135 missions and was the first program to reuse a spacecraft. Its main goal w ...

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)

Nicotine was first isolated in 1828, and its chemical structure was discovered in 1843. Nicotine was first obtained through a chemical process in 1904.

They are also used in analytical chemistry, e.g. to detect aldehydes (Tollens test).

It is 48% larger than Luna (Earth’s moon) and 80% more massive.

Each crystal is transparent, like ice. Light is reflected and scattered at the interface between the ...

This is the view of some researchers, claiming that a snowflake falling on water produces a high-fre ...