“We refer to it as acoustic bleaching. It’s as though suddenly there’s a big fog bank that just comes into where you’re living and suddenly you can’t see very far, only in this case the fog bank is noise.”
Chris Clark says temporary, natural sounds, like an iceberg breaking apart, may be as loud as an earthquake. But he says they are probably not as harmful to marine life as manmade sounds.
“It’s one thing to have evolved over 5 or 6 million years in a world that’s dynamic, with storms, with ice. The human-generated noise in the ocean is so chronically persistent, it’s now a real concern, and it dwarfs collective noise generated by icebergs.”
This is a time of warming oceans. Researchers say climate change may lead to more polar ice breaking apart, and making sounds as loud as earthquakes, in the Southern seas.
An international team of astronomers recently reported discovery of four powerful radio bursts. The astronomers think the radio signals may have come from halfway across the universe. They have a few theories about what might have produced the signals, but none of these theories have anything to do with strange, alien civilizations.
Astronomers observed a mysterious radio pulse coming from outside our solar system in 2007. Scientists had no idea what it was.
So a group of astronomers decided to study the skies with a radio telescope. They searched for pulsars, neuron stars or parts of stars that had exploded.
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2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25