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
The chilling atmosphere of pickets and protests at clinics has given way to a new ‘gold standard’ of care
The family planning advisers at Shaftesbury Square still remember the days of siege when anti-abortion protesters staked out the front and rear entrance of their office in central Belfast.
Some pickets would splash holy water on the doors and daub salt crosses on the pavement while others would thrust leaflets with pictures of babies and foetuses at woman entering or leaving the building, and sometimes follow them.
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