Think of its imperfections, its spots and splotches, carved out and cratered from the impacts of asteroids, meteorites, and comets ... side of the moon transitions through the same sequence of lunar ...

"We think the water came from the melting of nearby sub-surface ice called permafrost, and that the permafrost melting was ...

SpaceX stacked Starship 24 onto Super Heavy booster. The rocket is being prepped for a test flight in the near future. Credit ...

Most Americans agree that the country's involvement in WWII was sparked by the December 1941 Japanese attack on Pearl Harbor.