Yana, a 130,000-year-old baby mammoth, goes under the scalpel / Scientists Have Bred Woolly Mice on Their Journey to Bring Back the Mammoth / Hoping to revive mammoths, scientists create 'woolly mice' / Scientists take first step to bringing back mammoth by creating 'woolly mouse' / Meet the 'woolly mouse': why scientists doubt it's a big step towards recreating mammoths / Remains of 'remarkably well preserved' baby mammoth unveiled by scientists / Baby mammoth in Russia is the 'best-preserved' ever found / 'World's best-preserved mammoth' found in Siberia - video / Baby mammoth preserved for 50,000 years is unveiled in Russia's Siberia / 50,000-year-old baby mammoth remains go on display in Russia