5 Most Incredible Discoveries of the Week

The ultimate cold case solved and an intriguing discovery beneath Alcatraz are on the list:

• Mummy Mystery Solved: It Was Murder: She's been known to German archaeologists for more than a century, but they only now know where a mysterious mummy came from—and how she died. Answers: South America, and murder.
• Hidden Fortress Found Under Alcatraz: A surprising find under what used to be America's most notorious prison: Texas A&M researchers using ground-penetrating radar have discovered the remains of an old military fortress long believed to have been completely destroyed. Excavation of Fort Alcatraz is expected to start soon.
• Dogs Feel No Shame: Every dog owner knows the "guilty dog" look, but animal behavior experts say the pooches don't really feel ashamed at all. Researchers have found that the droopy-eyed, cowering look dogs give angry owners is a reaction to the anger, not any expression of guilt.
• World's Most Ancient Cheese Found in China: The oldest cheese ever found was already stale nearly a thousand years before the earliest Greek philosophers were munching on feta. Researchers in China have discovered that the odd clumps of yellow matter found on the necks and chests of mummies from as early as 1615 BC are actually lumps of amazingly well-preserved cheese.
• Under the Baltic Sea, an Incredible Stone Age Find: Some 52 feet below the surface of the Baltic Sea sits what the media is calling "Sweden's Atlantis"—though that is just a bit of an overstatement. While it's not a lost island, or even a lost village, it's a site that holds "one-of-a-kind" 11,000-year-old relics.

Click for more incredible discoveries, including the California couple who unearthed $10 million in gold coins on their own property. (More discoveries stories.)