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
Some underscore Trump’s unprecedented court appearance as protesters defend 14th amendment right
About 250 demonstrators packed the steps of the supreme court on Wednesday, chanting in defense of birthright citizenship as Donald Trump himself watched from the public gallery in an unprecedented appearance.
Beija McCarter, an eighth grade US history teacher, and Noah Goldstein, a New Yorker who was also at last month’s trans rights rally, both arrived at the demonstration with little optimism about what the justices inside might decide.
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