Their theories are based on the idea that a "universal grammar" might hold true for both aliens and humans.

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May 25, 2019 is National Wine Day. Even if you know your rioja from your Côtes du Rhône, here are a few wine facts that might be surprising. Happy drinking!
According to the U.S. Flag Code, you shouldn’t let the flag touch the ground or hang it upside-down. While there’s no express prohibition about reversing the image, it’s probably a safe bet you shouldn’t do that, either.
After the massive success of the 1977 original, and the downer ending of 'The Empire Strikes Back' in 1980, space opera mastermind George Lucas returned in 1983 to produce what everyone thought would be the final installment of 'Star Wars'.
See what you could be making after-tax if you lived in another country.
Although it doesn’t have quite the same archaeological provenance as hieroglyphs or dinosaur bones, historians believe there’s ample evidence to suggest that the mullet has been around for centuries. And it's gaining popularity once again.
A new book highlights under-appreciated products, graphics, and other designs produced under Soviet rule.
The most famous way to get across the East River officially opened 135 years ago.
From 2000 to 2014, a number of "diarrheal incidents" led to thousands of pool-goers getting sick.