New insights about Earth and its people

"Two new lines of evidence bolster the claim that the oldest known member of the human-evolutionary family lived in central Africa between 6 million and 7 million years ago."


"A project spanning five continents is aiming to map the history of human migration via DNA. The Genographic Project will collect DNA samples from over 100,000 people worldwide to help piece together a picture of how the Earth was colonised."

Meanwhile...
"Perhaps petroglyphs might be a way (besides linguistics and genetics) to trace the migrations of ancient peoples."


Finally:

"A tiny speck of zircon crystal that is barely visible to the eye is believed to be the oldest known piece of Earth at about 4.4 billion years old."