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
Public health and autism specialists roundly condemn alteration to the ‘vaccine safety’ webpage
A Centers for Disease Control and Prevention (CDC) website has been changed to reflect the belief of Robert F Kennedy Jr, the US health and human services secretary, that there is a link between vaccines and autism, a view flatly contradicted by experts and scientifically validated studies.
Public health and autism specialists roundly condemned the alteration to the CDC’s “vaccine safety” webpage, after it was changed to read: “The statement ‘Vaccines do not cause autism’ is not an evidence-based claim.”
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