The BE-4 engine is the “most powerful liquefied natural gas fueled rocket engine ever developed,” according to Blue Origin. Watch it gimbal at full power in these hotfire test views. Credit: Space.com ...
When it comes to UFO sightings, both true-blue believers and die-hard debunkers believe the truth is out there, science ...
The Great Blue Hole is a large marine sinkhole in the Caribbean Sea, some 70 kilometers (43 miles) from the coast of Belize.