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
A friend I’ve known for 50 years has become a self-absorbed, petulant know-all. Should I cut off contact? | Leading questions
This is a fairly common problem with decades-long friendship, writes advice columnist Eleanor Gordon-Smith . Do you respond to the person you knew, or the one you’re tired of knowing? Read more Leading questions An old friend – we first met over 50 years ago – used to be kind, supportive and good company. But she has become a self-absorbed and petulant know-all. She is the centre of her own little world, and all her friends – me included – are expected to run around after her and cater to her needs. She constantly brings up her health issues, disregarding the fact that other people in our friendship circle also have health worries. The label “narcissist” has been mentioned by some! Continue reading... from The Guardian https://ift.tt/bFYgi0C via IFTTT