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At the southern end of Madagascar lie four enormous wedge-shaped sediment deposits, called chevrons, that are composed of material from the ocean floor. Each covers twice the area of Manhattan with sediment as deep as the Chrysler Building is high. On close inspection, the chevron deposits contain deep ocean microfossils that are fused with a medley of metals typically formed by cosmic impacts. And all of them point in the same direction — toward the middle of the Indian Ocean where a newly discovered crater, 18 miles in diameter, lies 12,500 feet below the surface. The explanation is obvious to...

At the southern end of Madagascar lie four enormous wedge-shaped sediment deposits, called chevrons, that are composed of material from the ocean floor. Each covers twice the area of Manhattan with sediment as deep as the Chrysler Building is high. On close inspection, the chevron deposits contain deep ocean microfossils that are fused with a medley of metals typically formed by cosmic impacts. And all of them point in the same direction — toward the middle of the Indian Ocean where a newly discovered crater, 18 miles in diameter, lies 12,500 feet below the surface. The explanation is obvious to...

A major discovery of a gold mask alongside a treasure trove of artefacts at a Bronze Age site in China has generated online debate about whether there were once aliens in China thousands of years ago. The gold mask, possibly worn by a priest, along with more than 500 artefacts in Sanxingdui, a Bronze Age site in central Sichuan province, have become the talk of China since the news broke on Saturday The mask is similar to previous discoveries of bronze human statues, however, the inhuman and foreign features of the finds have triggered speculation they may belong to a...

Every year, millions of people travel to Utah to take in the beautiful and peaceful scenery in Zion National Park. According to a new study, however, the geographic stunner was formed by a massive prehistoric landslide that was far from tranquil. The study, published Thursday in the Geological Society of America, said the park’s flat valley floor owes its creation to the collapse of a wall of Navajo Sandstone that was almost 900 miles high. Weak layers in the underlying Kayenta Formation sent debris shooting across the canyon at speeds that likely reached 90 miles per second. It's believed that...