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	(Sponsor this newsletter) Male Fiddler Crabs Entrap Females In Their Bachelor Pads Male banana fiddler crabs take courting to a new, and pushy, level: The little Australian crab males wait for females to enter their burrows and then trap them in order to mate, scientists have found. Competition for mates is intense for banana fiddler crabs (Uca mjoebergi), the researchers said, with females often choosing between 20 or so males before saying "yes" to some fun between the sand grains. Often, during the mating season, a male will first enter his burrow, and a female will follow. Read More » Memory-Boosting Trick: Exercise After Learning Researchers found that people who did a high-intensity workout on a spinning bike 4 hours after completing a memory task had better recall when they were retested two days later than men and women who pedaled the bike immediately after the task, and those who didn't exercise after the task at all, according to the findings published today (June 16) in the journal Current Biology. The study showed that delaying exercise by 4 hours after learning has a "moderate" effect on memory, said Dr. Guillen Fernandez, a professor of cognitive neuroscience at The Donders Institute for Brain, Cognition and Behavior at the Radboud University Medical Center in the Netherlands. The findings showed that exercise improves memory performance and changes the way memories are stored in the brain, said Fernandez, who conducted the research with Eelco van Dongen, a postdoctoral student at the institute, and other colleagues. Read More » Americans Are Eating a Bit Healthier, Study Says From 1999 to 2012, the percentage of Americans who reported eating a poor-quality diet decreased from 56 percent to 46 percent, the researchers found. The percentage of Americans who ate what is considered to be an ideal diet remained low, however, increasing slightly from 0.7 percent in 1999 to 1.5 percent in 2012, according to the study, published today (June 21) in the journal JAMA. The researchers determined diet quality using a scoring system based on dietary recommendations from the American Heart Association (AHA). Read More » '3Doodler' Pen Lets You Draw 3D-Printed Creations in Midair Still, using a 3D printer isn't always simple: The machine is frequently housed within a box the size of a microwave, and it requires technical software and, in some cases, a detailed knowledge of design. In 2012, Maxwell Bogue and Peter Dilworth, co-founders of 3Doodler along with Daniel Cowen, were trying to come up with the next great kids' toy. The two wished they "could just take the nozzle off the 3D printer and fill in the missing gap," Bogue, now CEO of the company, told Live Science. Read More » Moral Dilemma of Self-Driving Cars: Which Lives to Save in a Crash New research has found that people generally approve of autonomous vehicles (AV) governed by so-called utilitarian ethics, which would seek to minimize the total number of deaths in a crash, even if it means harming people in the vehicle. The study, based on surveys of U.S. residents, found that most respondents would not want to ride in these vehicles themselves, and were not in favor of regulations enforcing utilitarian algorithms on driverless cars. Read More » Caribbean Sea's Curious 'Whistle' Detected from Space Bounded by South America, Central America and the Caribbean islands, the semi-enclosed basin of the Caribbean Sea acts like the body of a giant whistle, the scientists wrote in the study. "When you blow a whistle, you hear something because the air oscillates — pulses in and out of the whistle — and radiates a wave," the study's lead author Chris Hughes, a researcher at the National Oceanography Centre in Liverpool, in the United Kingdom, told Live Science. "In this case, the water is pulsing in and out of the Caribbean Sea. Read More »
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