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
Brussels officials will draw up a plan on how to use the EU’s little-known mutual assistance pact in the event of a foreign attack – key US politics stories from Friday 24 April
EU leaders have agreed that the European Commission “will prepare a blueprint” on how the bloc will respond if the little-known mutual assistance clause is triggered, according to Nikos Christodoulides, the president of Cyprus, who is hosting the talks.
They discussed the mutual defence clause, article 42.7 of the EU treaty, on Thursday night, before reports emerged that the US was exploring how to suspend Spain from Nato.
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