Sometimes the “whys” of history are lost, and that holds true to why Capt. John Cleves Symmes Jr. wholeheartedly believed the Earth was hollow.

The researcher contends the "excess" gravity necessary to bind a galaxy or cluster together could be due instead to ...

terrapins are identified by their beautiful and unique shells, which are marked with concentric circles. Terrapins thrive in brackish water with a higher salt concentration than freshwater but ...