Nonresident Alien: What it Means, How it Works

A nonresident alien is a noncitizen who has not passed or is exempt from the green card or substantial presence tests.

The coldest 'stars' in the galaxy might actually be alien megastructures

Ever since physicist Freeman Dyson first proposed the concept in 1960, the "Dyson sphere" has been the holy grail of ...
AlphaGalileo

Over 40 percent of freshwater megafauna species were introduced outside their native range – almost every second causes both benefits and harm

Over 40 percent of extant large freshwater animals (megafauna), including carp, salmonids, crocodilians, turtles, beavers, and hippopotamuses, have ...