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As heatwaves become more frequent and intense around the world, scientists are exploring new ways to keep buildings cool without increasing energy consumption. Researchers at the University of Sydney, working with startup Dewpoint Innovations, have developed a nano-engineered coating that reflects up to 97% of sunlight and stays significantly cooler than conventional surfaces.

There is always some tendency within ecosystems to retain the consequences of accidents caused by humans for some time, even after the accident itself. For more than a hundred years, a tiny island of volcanic origin lying off the coast of Australia offered a good lesson on the impact that invasive predators could have on an ecosystem.