Itching to Know? 5 Most Incredible Discoveries of the Week

A bearded mystery man and strange stuff going on in the pyramids make the list:

• Weird 'Anomalies' Seen in Egypt's Pyramids: A project to scan Egypt's pyramids is turning up "anomalies" that may lead to hidden passages or more. Two weeks of thermal scanning have revealed signs of internal cavities and structures in several pyramids, thanks to telltale temperature differences in adjacent rocks. This might just turn up a long-lost queen.
• Mosquitoes Hate This Sexy Scent: Researchers from New Mexico State University tested various remedies to figure out what worked best against mosquitoes. Three repellents that included the chemical DEET worked best, but the scientists also found that two DEET-free substances—including Victoria's Secret Bombshell perfume—worked fairly well. Another fragrance made the cut, too.

• More Bad News for Meat Lovers: On the heels of the news that bacon is apparently a carcinogen and hot dogs contain human DNA comes this: A new study finds that people who eat more grilled meat are at a higher risk of kidney cancer. And not just grilled red meat; even grilled chicken reportedly raises the risk. Switching to pan-frying might not help much, but Reuters offers up some cooking advice.
• Introducing an STD You've Never Heard Of: There appears to be a new STD in town. Doctors have actually known about mycoplasma genitalium, or MG, since 1981, but researchers have now found the strongest evidence to date that it can be transmitted through sexual contact. Most who have it don't even know.
• After 20 Years, 'Dead' Doctor Found Living as Hermit: For years, locals had seen a "silent stranger" in the forests of Tuscany. His ID may finally have come to light after two mushroom pickers say they found the camp of a man with a "dirty face and large beard." Who the mysterious stranger apparently was: a young Spanish doctor who had taken off during a depressive bout in 1996 and was thought to be dead. His ecstatic family was in for a disappointment, however.

Click to read about more discoveries, including how estrogen may help wounded soldiers. (More discoveries stories.)