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Dinosaur Tracks Suggest Tyrannosaurs Hunted in Packs

Some 70 million years ago, three tyrannosaurs stalked together across a mud flat in Canada, possibly searching for prey.

The new insight comes from several parallel tyrannosaur tracks unearthed in Canada. The dinosaur tracks provide stronger evidence for a controversial theory: That the fearsome mega-predators hunted in packs.

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The 'Breakthrough’ Sixth-Grade Science Project Center of Fight over Scientific Glory

Thirteen-year-old Lauren Arrington has been busy on the media circuit these past few weeks, doing interview after interview about the sixth-grade science project that landed her in a published scientific paper.

Arrington’s experiment revealed that lionfish — the invasive, venomous species of fish thought to be native to saltwater oceans – could actually survive in nearly freshwater environments, which could potentially damage the marine ecology of estuaries, where salty ocean water and fresh river water mix.

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Fukushima Study: Think about Unthinkable Disasters

A U.S. science advisory report says Japan's Fukushima nuclear accident offers a key lesson to the nation's nuclear industry: Focus more on the highly unlikely but worst case scenarios.

That means thinking about earthquakes, floods, tsunamis, solar storms, multiple failures and situations that seem freakishly unusual, according to Thursday's National Academy of Sciences report. Those kinds of things triggered the world's three major nuclear accidents.

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NASA: Earth Survived near-Miss from 2012 Solar Storm

Back in 2012, the Sun erupted with a powerful solar storm that just missed the Earth but was big enough to "knock modern civilization back to the 18th century," NASA said.

The extreme space weather that tore through Earth's orbit on July 23, 2012, was the most powerful in 150 years, according to a statement posted on the U.S. space agency website Wednesday.

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Are We Alone? Alien Pollution Might Reveal the Answer

Earthlings often wonder if life exists on other planets, and researchers said Wednesday that hunting for traces of pollution from distant worlds could provide the answer.

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Russian Cargo Craft Docks with ISS, Science Satellite Fails

A cargo craft successfully docked with the International Space Station, the Russian space agency Roskosmos said Thursday.

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Study: Climate Change Ravaging Antarctic Fur Seals

A food shortage likely caused by climate change is shrinking a South Antarctic fur seal colony and changing the profile of its surviving members, researchers said Wednesday.

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Study: Dogs Get Especially Jealous of Other Dogs

Dogs show jealousy when their owners spend time with what appears to be another dog, suggesting that the emotion may have survivalist roots, U.S. researchers said Wednesday.

Scientists tested 36 dogs and their owners with an experiment in which the owners were told to play with three separate objects in front of their dog.

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New Launch Date Set for ISS Delivery Vessel

A robot ship will be launched from Kourou, French Guiana, after a five-day delay on July 29 to deliver provisions to the International Space Station, space transport firm Arianespace said Tuesday.

The new date follows "the completion of complimentary verifications and control measures" of the Ariane 5 ES launcher that will bear the vessel aloft, it said in a statement.

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Elephants Possess 'Superior' Sense of Smell

Elephants possess a sense of smell that is likely the strongest ever identified in a single species, according to a study by Japanese scientists out Tuesday.

The African elephant's genome contains the largest number of olfactory receptor (OR) genes -- nearly 2,000 -- said the study in the journal Genome Research.

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