Learning has an evolutionary purpose: Among species, individuals that adapt to their environments will succeed. That’s why your brain more easily retains important or surprising information: It takes very little effort to remember that the neighbor’s dog likes to bite. Remembering the dog’s name is harder.
One ensures safety, the other is just a random fact.
Source: qz.com
We were driving on the lake bottom, yet we were more than 12,000 feet above sea level. The spring air was lip-chapping dry. Many of the fishing villages that have relied on Lake Poopó for thousands of years have emptied too, and we drove past clusters of abandoned adobe homes.
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In a world-first, an ESA-led team has built and fired an electric thruster to ingest scarce air molecules from the top of the atmosphere for propellant, opening the way to satellites flying in very low orbits for years on end.
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