Jakobshavn Isbrae in Greenland is generally considered to be the fastest glacier in the world, with speeds of up to 40 metres per day.
These sites contain evidence of the first appearance of bipedal (upright walking), apelike early humans.
Laetoli even reveals footprints of humans from 3.6 million years ago.
The first physically modern humans, Homo sapiens sapiens, appeared in tropical Africa between 200,000 and 150,000 years agodates determined by molecular biologists and archaeologists working together.
Dozens of archaeological sites throughout Asia and Europe show how people migrated from Africa and settled these two continents during the last Ice Age (100,000 to 15,000 years ago).
Archaeological studies have also provided much information about the people who first arrived in the Americas over 12,000 years ago.