|  Humans Butchered Elephants 500,000 Years Ago, Ancient Tool Suggests  | Stone tools that are half a million years old have been unearthed in Israel — and they still have traces of elephant fat clinging to them. Though anthropologists had strongly suspected that early humans used tools to break down a carcass for its muscle, fat and marrow, "there was no smoking gun to show that the stone tools were, indeed, used for these kinds of tasks," said study co-author Ran Barkai, a professor of archaeology at Tel Aviv University in Israel.
| Read More » Rosetta Spacecraft Makes Nitrogen Discovery on Comet  | A peculiar mix of molecular nitrogen on the comet target of Europe's Rosetta spacecraft may offer clues to the conditions that gave birth to the entire solar system. Molecular nitrogen was one of the key ingredients of the young solar system. Its detection in Comet 67P/Churyumov–Gerasimenko, which Rosetta is currently orbiting, suggests that the comet formed under low-temperature conditions (a requirement to keeping nitrogen as ice), according to officials with the European Space Agency. "Its detection is particularly important since molecular nitrogen is thought to have been the most common type of nitrogen available when the solar system was forming," ESA officials wrote in a statement.
| Read More » How Real-Life AI Rivals 'Chappie': Robots Get Emotional  | Artificial Intelligence will rule Hollywood (intelligently) in 2015, with a slew of both iconic and new robots hitting the screen. From the Turing-bashing "Ex Machina" to old friends R2-D2 and C-3PO, and new enemies like the Avengers' Ultron, sentient robots will demonstrate a number of human and superhuman traits on-screen. In this five-part series Live Science looks at these made-for-the-movies advances in machine intelligence. Outside of Hollywood, engineers are working to more fully integrate emotional and artificial intelligence.
| Read More » Weird 'Water Tongue' Lets Fish Feed on Land  | A fish that uses water as a sort of tongue to feed on land could shed light on how animals with backbones first invaded land, researchers say. These fish evolved into the first tetrapods (four-legged land animals), which ultimately gave rise to amphibians, reptiles, birds and mammals.
| Read More » Amazon's FAA Approval May Not Give Commercial Drones a Lift  | After threatening to take its drone development abroad, Amazon got approval from the Federal Aviation Administration (FAA) this week to test its much-hyped Prime Air delivery drones on private property in the United States. But this certificate might not be what Amazon had hoped for, and this latest development could spell bad news for the rest of the burgeoning commercial drone business. "I view it as a setback for the industry," said Brendan Schulman, an attorney and expert in drone policy. Under the terms of the FAA certificate, Amazon drone operators will be able to test their aircraft during the day, up to an altitude of 400 feet (122 meters).
| Read More » No More Lions and Mammoths: Real Explorers Eat Bugs  | To cater the infamous cocktail hour at the 111th Explorers Club Annual Dinner at the American Museum of Natural History, Gordon has a $15,000 budget for the insects and other arthropods alone. "In the old days, the conservationists were hunters," Nichols said.
| Read More » Astronaut and Cosmonaut to Launch on 1-Year Space Mission This Week  | An American astronaut and two cosmonauts are set to fly up to the International Space Station Friday (March 27), and two of those crewmembers won't be back on Earth for about a year on a mission that aims to help open the doorway to deep space for Earthlings. NASA astronaut Scott Kelly and cosmonaut Mikhail Kornienko are due to launch on their yearlong mission to the space station on Russian Soyuz spacecraft from the Baikonur Cosmodrome in Kazakhstan with cosmonaut Gennady Padalka. Kelly and Kornienko's mission will mark the first yearlong mission aboard the station, and the first time an American has spent a continuous year in space.
| Read More » Tumors grown in dishes could help customize cancer treatment Experiments conducted at an underground laboratory at Vanderbilt University could prove vital in the fight against cancer. Alex Walsh, a biomedical researcher, is using a laser to make what she calls organoids glow. The organoid is then dosed with a cocktail of cancer drugs and placed under a microscope at which point it is blasted with a laser. Measuring the variations in the intensity of the resulting fluorescence provides a readout of cellular metabolism which, Walsh says, is an accurate and speedy biomarker of drug response. Read More » Marijuana Science: Why Today's Pot Packs a Bigger Punch The marijuana that is available today may be much more potent than marijuana cultivated in the past, according to the results of new tests. The psychoactive component in the marijuana plant is the chemical THC, and the new tests showed that today's marijuana may contain 30 percent THC, Andy LaFrate, the author of the new report, said in a statement. By contrast, THC levels in marijuana 30 years ago were lower than 10 percent, said LaFrate, who is the president and research director at Charas Scientific, one of eight labs certified by the state of Colorado to conduct marijuana potency testing. At the same time, the marijuana samples tested had very low levels of a compound called cannabidiol, or CBD, that is touted for its medicinal properties. Read More » Kids Whose Ears Stick Out Are Cuter, Science Confirms The findings show that "protruding ears catch the eye, but not necessarily the imagination in a negative way," said Dr. Ralph Litschel, the lead author of the study. For some kids in the study, "protruding ears may have added to their cuteness," said Litschel, an ear, nose and throat specialist and facial plastic surgeon at Cantonal Hospital St. Gallen in Switzerland. Read More » Can You Really Freshen Up Women's 'Aging' Eggs? One fertility treatment company claims it can, by rejuvenating women's aging eggs. The company, called OvaScience, says its method aims to improve the health of an egg's mitochondria, which are the tiny powerhouses that give cells the energy to divide and grow. Although some early evidence suggests aging mitochondria could reduce a woman's fertility, expert say, there are no studies that prove the new method will work. "They're quite private and secretive about what they're doing," said Dr. Aimee Eyvazzadeh, a San Francisco Bay Area ob-gyn and fertility specialist who has no affiliation to OvaScience. Read More » As Forests Burn, Conservationists Launch Global Wildlife Rescue (Op-Ed)  | Jeremy Radachowsky is assistant director for the Latin American and Caribbean Program at the Wildlife Conservation Society (WCS). In 1998, in one of my first real experiences in the tropics, I volunteered as a research assistant to track tapirs in Corcovado National Park. As the months wore on, I watched as the forest understory withered and the creek beds dried up. But that year, the effects of El Niño were more extreme.
| Read More » Hiding Out of Sight, Are Sharks Self Aware? (Op-Ed)  | Ila France Porcher is a self-taught, published ethologist and the author of "The Shark Sessions." A wildlife artist who recorded the behavior of animals she painted, Porcher was intrigued by sharks in Tahiti and launched an intensive study to systematically observe them following the precepts of cognitive ethology. Credited with the discovery of a way to study sharks without killing them, Porcher has been called "the Jane Goodall of sharks" for her documentation of their intelligence in the wild. If you are in the water, and a shark becomes aware of you, on its first appearance it comes only briefly into view at the limit of the visual range (the distance at which a view is obscured, from both you and the shark, by particles in the water). For example, during my ethological study of reef sharks in French Polynesia, young males appeared after sunset in excited bands to mate.
| Read More » Will We Combat Global Warming, Despite Our Nature? (Op-Ed) In a recent article (Human Nature May Seal the Planet's Warming Fate), I used the allegory of "Who Moved my Cheese?" to suggest that people's innate biases may in fact be an evolutionary adaption, one that thwarts the changes demanded by climate change. This in contrast to simpler life forms such as mice: They have seemingly lower cognitive abilities, yet adapt far easier and more willingly to changes in their habitat. Read More » Did Cosmic Inflation Really Jump-Start the Universe? (Kavli Hangout)  | Kelen Tuttle, writer and editor for The Kavli Foundation, contributed this article to Space.com's Expert Voices: Op-Ed & Insights. The oldest light in the universe, the cosmic microwave background, is a fossil from the Big Bang that fills every square inch of the sky. Researchers working on the Planck satellite — which detects distant light from its orbit 930,000 miles above Earth — released new maps of the cosmic microwave background. In a second publication, scientists on both Planck and the Background Imaging of Cosmic Extragalactic Polarization 2 (BICEP2) experiment — which, from its site at the South Pole, studies the cosmic microwave background — announced that previous data, which seemed to offer "smoking gun" evidence of inflation, had been misunderstood.
| Read More » What Would It Be Like to Live on Jupiter's Moon Europa?  | Jupiter's icy moon Europa has long been thought of as a potentially friendly place for life in the solar system. The gas giant has a small rocky core with a mass 10 times less than Earth's, but it's surrounded by dense liquid hydrogen extending out to 90 percent of Jupiter's diameter. If you were to step foot on the planet's core, "you would be crushed by the weight of the liquid hydrogen above," said Robert Pappalardo, a planetary scientist at NASA's Jet Propulsion Laboratory (JPL). With its low radiation levels, geologic stability and large amount of water ice, Callisto probably would be the ideal Jovian moon for a settlement, said JPL astrobiologist Steve Vance.
| Read More » Obama, wowed by young scientists, announces new STEM pledges  | WASHINGTON (AP) — The small Lego machine inside the White House whirred, and in a moment it was turning the pages of a story book. One page flipped, then another, ever faster as President Barack Obama marveled at its efficiency.
| Read More » First (Contraband) Corned Beef Sandwich in Space 50 Years Ago  | Just about two hours into the flight of Gemini 3, NASA's first two-man space mission 50 years ago Monday (March 23), pilot John Young reached into his spacesuit's pocket and pulled out a surprise. What Young revealed was the world's first — and possibly last — corned beef sandwich to fly in space. Grissom's fellow Mercury astronaut Wally Schirra, who had a reputation for pulling pranks (he called them "Gotchas"), had purchased the sandwich from Wolfie's Restaurant and Sandwich Shop at the Ramada Inn in Cocoa Beach two days earlier.
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