Where does this come from, and can I check it?

Trapped air bubbles preserve samples of the atmosphere from past centuries. The figure is taken from British Antarctic Survey, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a history fact?

Yes. It sits on the History shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Ice cores store a year by year climate record

Trapped air bubbles preserve samples of the atmosphere from past centuries Snow falling on ice sheets traps air and dust, and the layers build up like tree rings. Drilling at Greenland and Antarctica has produced cores spanning hundreds of thousands of years, with bubbles of ancient atmosphere still inside. Researchers also use volcanic ash layers in ice to tie together records from different parts of the world. It sits in Mondo's history collection, one of 200 facts that each trace back to the reference below.

Where this comes from

British Antarctic Survey

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: ice-cores, climate, archives

Ice cores store a year by year climate record: the short answers

Where does this come from, and can I check it?: Trapped air bubbles preserve samples of the atmosphere from past centuries. The figure is taken from British Antarctic Survey, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a history fact?: Yes. It sits on the History shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.