Roman concrete was remarkable because it could last for thousands of years, even underwater. Its mixture of lime, volcanic ash, and water allowed it to develop cracks that didn’t weaken it. When water entered a crack, it reacted with the lime to form calcium carbonate, which gradually filled the crack and bonded the concrete back together, essentially giving it a natural self-healing ability.
Prime Minister Anthony Albanese was asked why he didn’t split the hate speech bill in the first place. He said it was a “sensible” thing to do and that there was “no overreach” in it. What?
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