As Stratolaunch Systems Corp. has rolled its super-massive aircraft out of the hangar during the last year and performed some ground-based tests, there has been one big unanswered question—what is the purpose of building the largest airplane in the world?
Source: arstechnica.com
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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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.
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