KevinDyer / iStockphoto/ Getty ImagesWeird ScienceInvasive South American lizard sighted in Georgia for 3rd year, conservation group says
HAN Zhixin / Los Angeles Natural History MuseumWeird ScienceIt's a bird, it's a dinosaur, it's ... really tiny: New species baffles dinosaur experts
Dave Fleetham / Design Pics / Getty ImagesWeird ScienceA museum's narwhal tusk disappeared more than 40 years ago. The FBI wants your help to find it.
Courtesy of Leeds Museums and GalleriesWeird ScienceAncient voice: Scientists recreate sound of Egyptian mummy
Keystone / Getty ImagesWorldNew theory in the never-ending search for the Loch Ness monster: A really big eel
Brian Ach / AP fileCulture MattersRapper Residente partners with scientists to create music with brain patterns
Yuri Arcurs / Getty Images/iStockphotoScienceEarth's core has been leaking for 2.5 billion years and geologists don't know why
Jackson Gibbs / for NBC NewsScienceScientists are searching for a mirror universe. It could be sitting right in front of you.
xavierarnau / Getty ImagesSpaceSpace aliens are breeding with humans, university instructor says. Scientists say otherwise.
DoD via To the Stars Academy of Arts and SciencesSpaceU.S. Navy is revising rules to encourage pilots to report unusual sightings
iStock / Getty ImagesThe Big QuestionsElon Musk says we may live in a simulation. Here's how we might tell if he's right
Sciepro / Science Photo Library/Getty ImagesScienceSperm-inspired robots could be the next big thing in medicine
ERproductions Ltd / Getty Images/Blend ImagesInnovationGut bacteria may hold key to creating universal donor blood type
Victor De Schwanberg / Science Photo Library/Getty ImagesThe Big QuestionsCosmic 'Bruise' Could Be Evidence for Multiple Universes