Known as the Yonaguni Monument, this 90-foot underwater formation has left scientists and divers equally stunned, and some now believe it could predate Egypt's pyramids... by thousands of years.

The mystery over the tsunami that formed in the Pacific Ocean on Oct. 9 deepened as researchers found that a series of 13 tsunami were generated over 90 minutes on that day. The latter six tsunami ...

YAMAMOTO, Miyagi Prefecture--A striking memorial has opened at a battered local school that became refuge to 90 people from the deadly tsunami caused by the 2011 Great East Japan Earthquake.

An earthquake followed by a landslide in 1958 in Alaska’s Lituya Bay generated a wave 100 feet high, the tallest tsunami ever documented. When the wave ran ashore, it snapped trees 1,700 feet ...