Cape Verde Boulders Indicate Massive Tsunami 73,000 Years Ago
TaleSlinger writes: Researchers from University of Bristol, UK found that boulders strewn 200m above sea level on Cape Verde, off the west coast of Africa, were ripped from cliffs below and washed up there by a tsunami between 170m and 270m (550-850ft). Researchers at Columbia University's Lamont-Doherty Earth Observatory dated the tsunami at 73,000 years ago. It's interesting that this is about the same time as the Mt. Toba Eruption and about the same time humans nearly became extinct.
Due to limited variation in human DNA there is a hypothesis that human population was substantially reduced around 70,000 to 100,000 years ago.