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Dolphins love hot rock

A dolphin with an appreciative ear for human music has been shadowing a member of north Cottesloe swimming group PodSquad. He was listening on his waterproof earbuds when the dolphin tuned in, following withing half a metre, in a 10-minute encounter. “Obviously they had never heard the Red Hot Chili Peppers before,” said Shane McGurk, a founder of the beach’s 250-strong PodSquad. “We were convinced the dolphins could hear the music.” The sea creature’s taste in funk and punk rock would likely come as news to Australian National University (ANU) researchers, whose scientific study showed dolphins were attracted by flute, piccolo, the Indian wooden recorder, and a high-pitched singing voice.

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Spectacular sunrises and sunsets seen in Perth this week are the result of a huge undersea volcano that erupted in the Pacific Ocean in January. A monster plume rose into the stratosphere and beyond, its particles now causing a vivid orange glow just before sunrise and after sunset each day. The Hunga Tonga Hunga Ha’apai volcano erupted with a mushroom cloud near Tonga, but it has taken six months for the upper-atmosphere plume of particles to reach us. Particles in the atmosphere provide a surface to scatter light, University of Melbourne atmospheric chemist Professor Robyn Schofi eld told the ABC. “What happens is that the troposphere is all in shadow, and about 20 to 25 minutes after sunset, most of the light is scattering off the stratosphere and down into our eyes,” she said. Particles reached 58km above the earth’s surface.

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