Science

Under natural conditions, nicotine occurs in the leaves and roots of noble tobacco (Nicotiana tabacum), which is most often used in the tobacco industry. The leaves contain 1 to 3 percent of nicotine.

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.

They are found in all climatic zones, mainly on land, but also in waters, both salty and fresh. The ...

The number of stars was originally estimated at around 100 million, but recent measurements suggest that this number may be up to four times greater.

As temperatures rise, snowflakes become larger as the crystals thaw and then stick together to form ...

Apart from "Ham the Astrochimp," the agency sent insects, rats, pigs, jellyfish, spiders, and rabbits.

It affects the nervous system, causing pleasant experiences that can be compared to the effects of t ...

It is about 109 times larger than the Earth and its mass is approximately 333.000 Earth masses. The Sun accounts for about 99.86 percent of the mass of the solar system.

Coins were produced from it as early as the 7th century BC. They were made in an ancient country called Lydia, from an alloy of silver and gold called electrum.

The hyphae branch and connect, which leads to the formation of mycelium, which is an interconnected ...