Bedrock (also termed Bed rock) is a layer of undisturbed rock usually located beneath a surface layer of soil or other material. In areas of high erosion, bedrock may become exposed to the surface. Bedrock can be of igneous, sedimentary, or metamorphic...

Bedrock is the native consolidated rock underlying the surface of a terrestrial planet, usually the Earth. Above the bedrock is usually an area of broken and weathered unconsolidated rock in the basal subsoil. The term implies that the rock lies in...

An orbiting spacecraft has sent back new evidence for the presence of water on Mars. Scientists long have debated whether water flowed on the red planet, with evidence increasing in recent years. The presence of water would raise the possibility of at least primitive life...

Former FBI Director J. Edgar Hoover had a plan to suspend the rules against illegal detention and arrest up to 12,000 Americans he suspected of being disloyal, according to a newly declassified document.Hoover sent his plan to the White House on July 7, 1950, less...

Former FBI Director J. Edgar Hoover had a plan to suspend the rules against illegal detention and arrest up to 12,000 Americans he suspected of being disloyal, according to a newly declassified document.Hoover sent his plan to the White House on July 7, 1950, less...

For many Sept. 11 victims' relatives, the World Trade Center site is hallowed ground. Some, like Sally Regenhard, have never received any of their loved ones' remains, and so have never been able to bury them."I feel my son is there," said Regenhard, the mother...