Cecil the lion is shown walking in Zimbabwe's Hwange National Park in a YouTube video from July 9, 2015. Credit: Bryan Orford Bryan Orford/YouTube hide caption

itoggle caption Bryan Orford/YouTube

An elephant in South African offers an up-close glimpse of its prodigious instrument. According to Sean Hensman of Adventures with Elephants, trunks like this one could help the U.S. Army develop a better landmine sensor. Greatstock/Barcroft Media/Barcroft Media/Landov hide caption

itoggle caption Greatstock/Barcroft Media/Barcroft Media/Landov

A manatee spotted in the Chesapeake and Delaware (C&D) Canal on Thursday. It's very unusual for the Florida native to get so far north. Delaware Division of Fish and Wildlife hide caption

itoggle caption Delaware Division of Fish and Wildlife

Lee Perry-Gal measures chicken long bones at the zooarchaeology lab, Zinman Institute of Archaeology, University of Haifa. Courtesy of Guy Bar-Oz hide caption

itoggle caption Courtesy of Guy Bar-Oz

During the 2014 Tournament of Roses Parade, SeaWorld's float was accompanied by police in Pasadena, Calif. PETA supporters were arrested for protesting the float that day, and PETA claims that a SeaWorld employee posing as a PETA volunteer tipped police off to the protest. Ringo H.W. Chiu/AP hide caption

itoggle caption Ringo H.W. Chiu/AP

In this colorized image of a brain cell from a person with Alzheimer's, the red tangle in the yellow cell body is a toxic tangle of misfolded "tau" proteins, adjacent to the cell's green nucleus. Thomas Deerinck/NCMIR/Science Source hide caption

itoggle caption Thomas Deerinck/NCMIR/Science Source
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