Curtin University researchers use innovative techniques to date three-billion-year-old impact crater in Pilbara region A meteorite that struck Earth three billion years ago left behind a “smoking gun” – evidence of the world’s oldest impact crater in a remote part of Australia. Ancient rocks in Western Australia’s Pilbara region record the event, which occurred during the Archean eon, a period 4 to 2.5 billion years ago, when tectonic plates were beginning to form and early life emerging. Continue reading... from The Guardian https://ift.tt/vFNkr3E via IFTTT
President plans to honor Sarah Beckstrom, who was fatally shot, as well as Andrew Wolfe, who is in critical condition
Donald Trump said on Sunday that he invited the family of a national guard member fatally shot last week to the White House, adding that he spoke to her parents and they were “devastated”.
US army specialist Sarah Beckstrom, 20, was killed in a shooting on Wednesday in Washington DC. Her fellow service member, US air force staff Sgt Andrew Wolfe, 24, remains hospitalized in critical condition. Vigils across West Virginia have taken place in their memory.
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