It looks like mankind may have suddenly aged by nearly a half-million years.According to a pair of newly published papers in the journal Science, paleoanthropologists working in Ethiopia have discovered a 2.8-million-year-old jawbone, making it the oldest fossil in the human ancestral line ever found by more than 400,000 years."It shows that every single person here, 7 billion people, including Donald Trump, came down through the chain," said Dr Alemseged, referring to Lucy's place in the evolution of humankind.Throughout the world’s rock layers there are billions of fossils, the remains of organisms that were catastrophically buried largely during the global Flood (2348 BC).They have also found numerous skeletal remnants from multiple lines of the human genus Homo—of which Homo sapiens are the only remaining species—that are 2.3 million years old and younger.Little, however, has been discovered from that interim 700,000-year period to explain or date the evolution from Australopithecus to Homo that occurred during that timeframe, and that gap in the fossil record has hampered scientists’ understanding of human origins.
Researchers have discovered numerous fossils from Lucy’s Australopithecus afarensis species—ape-like, bipedal human ancestors approximately 4 feet tall—that are 3 million years or older.
Some commentators have questioned why Mr Obama was allowed to touch the fossil.
Lucy's bones were taken on a six-year exhibition tour of the US from 2008-2013, despite Don Johanson, who discovered the fossil, stating that although he was somewhat uneasy about the possibility of damage.
Para ilmuwan menggunakan teknik yang dinamakan "radiometric dating" untuk mengira usia fosil dan bumi.
Banyak orang yang dibuat percaya bahwa metode tersebut membuktikan bahwa bumi ini sudah berusia milyaran tahun.
US President Barack Obama (2nd R) touches a bone fragment of "Lucy", who was estimated to have lived 3,2 million years ago, alongside Ethiopian Prime Minister Hailemariam Desalegn (R) and Zeresenay Alemseged (2nd L), head of the California Academy of Sciences, prior to a State Dinner at the National Palace in Addis (AFP) Scientists told reporters the valuable partial skeleton was transported secretly and under tight security out of its museum.