Data from NASA's Chandra X-ray Observatory reveals that Sagittarius A* - the "monster heart" of the galaxy containing Earth - has a peculiar gas vent.Sagittarius A* is the dormant central ...
According to National Geographic, sinkholes occur when water dissolves the surface rock. The surface rock is often limestone, and rainwater accumulates in cracks that gradually dissolve and wash away this ...
Recently, several deep sinkholes have emerged sporadically in Nghe An province, causing panic among local residents. The frightening aspect is that there are no warning signals when these phenomena occur.A ...
