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
Shooting of 15-year-old ‘beautiful soul’ in California revives scrutiny on law enforcement abuse of youth with disabilities
When Ryan Gainer was diagnosed with autism as a toddler, he was nonverbal, and his family all learned sign language to communicate with him. But after the southern California boy learned how to speak at around age four, he was a “ball of energy” who never stopped talking, his older sister Rachel said.
He loved saying “hi” to neighbors and strangers alike, and as a young teen was known as the student who greeted everyone with a “good morning” and a smile.
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