Coral bleaching puts damselfish in distress and other top stories.

• Coral bleaching puts damselfish in distress

  

  Video will begin in 5 seconds. Can we reverse coral bleaching? We head north to Queensland to see if anything can be done to save the Great Barrier Reef. PT1M48S 620 349 The odour from coral bleaching is masking the smell of predators to small reef fish, a Queensland study has found.A research team of scientists from James Cook University and Sweden's Uppsala University spent two months on a field study at the northern end of the Great Barrier Reef last year to determine wheth..

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• 2325 and counting: Kepler doubles its haul in largest exoplanet discovery ever

  

  Since it launched six years years ago, NASA's Kepler space telescope has provided a guiding light in our search for extraterrestrial life, scanning the sky for potentially habitable Earth-size planets. Today the agency has announced the discovery of almost 1,300 new exoplanets, doubling the craft's previous tally and giving the chances of finding another world just like ours a healthy little boost. The announcement was made after researchers sifted through Kepler's July 2015 planet catalogue, w..

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• Axe discovery in WA: Aboriginal ancestors' tool is world's oldest

  

  The fragments of the axes were found in the Kimberley region of Western Australia.AUSTRALIA was the birthplace of the axe, scientists believe after identifying a nearly 50,000-year-old fragment discovered in Western Australia.The tool was found by archaeologists in the remote Kimberley region and shows that early Australians were technological innovators and were more advanced in their use of tools than previously thought.The thumbnail-sized fragment is dated between 44,000 and 49,000 years old,..

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• Canadian teen William Gadoury's discovery of 'Mayan city' debunked as junk science

  

  Video will begin in 5 seconds. Digital Indiana Jones finds lost city 15-year-old Canadian, William Gadoury claims to have discovered a lost Mayan city using Google Maps and ancient Central American star charts. PT1M4S 620 349 The apparent discovery of a previously unknown Mayan city in the Yucatan jungle by a 15-year-old Canadian boy has been dismissed as "junk science" by a US archaeologist who was also a child prodigy at the same age on the same subject.Others think the new ..

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• Drone captures rare moment as whales take down juvenile shark

  

  You might think sharks have little to fear as they glide about the ocean, but dolphins and their relatives can be pretty cunning predators themselves. A drone has captured a rarely seen moment of maritime madness, filming a pack of false killer whales chase and kill a juvenile shark off the coast of Sydney, Australia. Drone hobbyist and cinematographer Bruno Kataoka didn't set out to capture the event, but has landed himself a slice of footage that wouldn't look out of place in a professional w..

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• 'Dismay': NASA appeals to CSIRO not to cut global climate efforts

  

  EXCLUSIVE Video will begin in 5 seconds. How aerial maps are made using AERONET Modern aerial mapping is made possible by removing atmospheric distortions caused by fine particles called 'aerosols', NASA scientist Brent Holben explains. PT1M6S 620 349 The US space agency NASA has appealed to CSIRO to abandon plans to cut a key monitoring program that it says will undermine Australia and the world's ability to monitor and predict climate change. The cost to our international r..

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• Early Earth's air weighed less than half of today's atmosphere

  

  The idea that the young Earth had a thicker atmosphere turns out to be wrong. New research from the University of Washington uses bubbles trapped in 2.7 billion-year-old rocks to show that air at that time exerted at most half the pressure of today's atmosphere. The results, published online May 9 in Nature Geoscience, reverse the commonly accepted idea that the early Earth had a thicker atmosphere to compensate for weaker sunlight. The finding also has implications for which gases were ..

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• Carbon dioxide levels continue to rise in cleanest air in world in north-west Tasmania

  

  Carbon dioxide levels continue to rise in cleanest air in world in north-west Tasmania Updated May 11, 2016 12:08:33 The cleanest air in the world is becoming more polluted, with air measurements in remote north-west Tasmania poised to hit a new high of 400 parts per million (ppm) of carbon dioxide within two or three weeks. Key points: Carbon dioxide levels at Cape Grim were only 300ppm in 1970Those levels expected to hit 400ppm within the next three weeksCSIRO scient..

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