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
This back yard creature must be kept under constant chemical constraint, or it risks becoming more liability than asset
I’ll call him Bruce. He’s any of the 3.1 million Australians living in a house with a pool or spa. Over my long career in hardware, listening to the woes of so many Bruces, I’ve discovered that owning a pool is not all fun and bubbles at cocktail hour.
In the beginning, it wasn’t so bad. On first viewing his bayside property, Bruce already believed the agent’s claim that by far the most desirable addition to any home is a pool. It did look nice, glistening blue in the back yard. And weren’t the kids rapt. But now, years later, Bruce isn’t.
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