Indian and Spanish scientists claim to have found evidence of a new human ancestor after studying the DNA of two Andamanese tribes, Jarawas and Onges,
and comparing them to ancient hominids. A team of scientists from the National Institute of Bio-Medical Genetics ( NIBMG) in Kalyani, West Bengal, and the Pompeu Fabra University in Barcelona, Spain, collaborated on the project. Their study has been published in Nature Genetics , a science journal. According to conventional evolutionary science, Homoerectus, the earliest-known hominid evolved in Africa two million years ago. Some 600,000 years ago, a new species branched from Homoerectus in Ethiopia—
Homo heidelberg en sis. Homo heidelberg en sis came out of Africa 400,000 years ago, and split into two lineages. One was the Neanderthal, which moved from Africa to Europe through West Asia. The other was the Denisovan, named after the Denisova cave in Russia. When comparing the DNA sequences of Jarawas and Onges with those of the Neanderthal and Denisovan, we found some notable differences. By exploring various possibilities that could have given rise to these differences, we have concluded that these DNA fragments belong to an extinct hominid that shares a common ancestor with the Neanderthal and the Denisovan but has a different history, the scientists said.