Airport Holdups Worsen Independence Day aside, the FAA’s flight delay woes don’t look like they’re ending anytime soon. New statistics for the month of May show that airline tardiness worsened for the fifth month in a row, to the point where nearly one out of four flights suffered delays of 15 minutes or more.TECH WATCH: GPS Could Cut Airline Flight DelaysPODCAST: Fighting Summer Travel Headaches Hortibot Hunts Down Weeds Farmers won’t be trading in their tractors any time soon, but a new machine could be joining them in the field—and it only has a brain. Danish scientists have designed a smart robot that uses GPS to crawl through fields, locate 25 different types of weeds, then automatically spray, torch, laser or pluck them.EARLIER: High-Tech Farming 101LAWN CARE: Keeping Weeds at Bay the Natural WayIrish Company Hypes Perpetual Motion Machine Steorn wouldn’t be the first company to claim it has invented a perpetual motion device that can produce infinite free energy, but it will be the first to put the device on display at London’s Kinetica museum for 10 days, with an open invitation to scientists to come and debunk it. Sadly, the opening of the exhibit has already been delayed due to “technical difficulties,” which often crop up when you attempt to break the laws of physics.LAB TEST: We Debunk Fuel-Saving GizmosGREEN LIVING: Can Pond Goo Power AmericaScientists Unravel Hyperion’s Mysteries When NASA’s Cassini spacecraft first captured the crater-pocked surface of Hyperion, one of Saturn’s moons, scientists were puzzled by the rock’s spongy appearance – but not any longer. After estimating Hyperion’s mass and volume, they discovered that its density is only more than half that of water, explaining why debris scars the surface so drastically.EARLIER:
