Ionisation

1 + -1 = 0

Since matter and antimatter are characterized by opposite properties, they will annihilate each other when they meet.

Endunga

The Tibetan calendar ( ལོ་ཐོ )

is a lunisolar calendar. This means that the Tibetan year is composed of either 12 or 13 lunar months, each beginning and ending with a new moon. A thirteenth month is added every two or three years so that an average Tibetan year is equal to the solar year.

Chemical reactions between the glacial sediment and the air remove CO₂ from the atmosphere

We often talk about things moving at a glacial pace if they are slow, but actually glaciers can be relatively fast. Some, such as Meserve Glacier in Antarctica, will barely move at all each year, but others, like Jakobshavn Isbrae in Greenland, will move as much as 40m a day