smithsonianmag.com

TIL The first air conditioner was created not for cooling a room but to prevent humidity causing swelling pages and blurry prints in a printing press (www.smithsonianmag.com)

At the turn of the 20th century, humidity threatened the reputation of Brooklyn’s Sackett-Wilhelms Lithographic and Publishing Company’s high-quality color printing. After two summers of extreme heat disrupted business and caused swelling pages and blurry prints, the printing company found that a nascent cooling industry...

TIL Kudzu growth in the US has been way overestimated. Newer estimates stated that Asian privet had invaded some 3.2 million acres—14 times kudzu’s territory (www.smithsonianmag.com)

In news media and scientific accounts and on some government websites, kudzu is typically said to cover seven million to nine million acres across the United States. But scientists reassessing kudzu’s spread have found that it’s nothing like that. In the latest careful sampling, the U.S. Forest Service reports that kudzu...

New evidence suggests an ice age in western Europe interrupted hominid occupation of the continent for 200,000 years (www.smithsonianmag.com)

The evidence comes from a deep-sea sediment core taken off the coast of Portugal. This newly discovered cold snap happened about 1.15 million years ago, causing early humans to leave or die off. It perhaps extended throughout the Mediterranean to as far as southwestern Asia.

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