Dyson sphere - Wikipedia
A Dyson sphere is a hypothetical megastructure that encompasses a star and captures a large percentage of its power output. The concept is a thought experiment
The 1,700-year-old megastructure history almost forgot | CNN
In our roundup of travel stories this week: a man recreates his father’s round-the-world bicycle trip, a luxury yacht that turned out to be a mold-covered wreck, plus the ancient Roman city 10 times the size of Disneyland.