Researchers say that inside the head of the worm C. elegans, an antenna-like structure at the tip of the AFD neuron (highlighted in green) is the first identified sensor for Earth's magnetic field. Andrés Vidal-Gadea hide caption

itoggle caption Andrés Vidal-Gadea

Raymond Wang, 17, of Vancouver, celebrates winning first place at the Intel International Science and Engineering Fair in Pittsburgh, May 15. Courtesy of Kathy Wolfe/Intel hide caption

itoggle caption Courtesy of Kathy Wolfe/Intel

The 200-inch Hale Telescope, a masterpiece of engineering at Caltech's Palomar Observatory, was the world's largest telescope until 1993. Scott Kardel/Palomar Observatory/Courtesy of Palomar Observatory/California Institute of Technology hide caption

itoggle caption Scott Kardel/Palomar Observatory/Courtesy of Palomar Observatory/California Institute of Technology

NOAA Fisheries biologist Nick Wegner holds an opah caught during a research survey off the California coast. Researchers say the opah is the first fish known to be fully warmblooded, circulating heated blood throughout its body. NOAA/Reuters/Landov hide caption

itoggle caption NOAA/Reuters/Landov

Sir David Attenborough at the Beijing Museum of Natural History with fossil of Juramaia, as featured in the Smithsonian Channel series Rise of Animals: Triumph of the Vertebrates. Courtesy Smithsonian Channel hide caption

itoggle caption Courtesy Smithsonian Channel

State Sens. Warren Limmer (left) and Bill Ingebrigtsen talk in the Senate chamber. Limmer said he has been scolded for looking at his colleagues during debate before, and had "to beg forgiveness to the Senate president." David J. Oakes/Minnesota State Senate hide caption

itoggle caption David J. Oakes/Minnesota State Senate

Rabia Salihu Sai'id, Mojisola Usikalu, Nashwa Eassa, Mojisola Oluwayemisi and Dang Thi Oanh won the Elsevier Foundation Awards for Early Career Women Scientists in the Developing World Alison Bert/Elsevier Connect hide caption

itoggle caption Alison Bert/Elsevier Connect

Genetically modified rice plants are shown in a lab in 2006. A new report from Pew Research shows a wide gap between perceptions of safety of GM foods between scientists and the general public. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Some physicists are pushing back against ideas like string theory and the multiverse. Here, we see a computer-generated image of a black hole, which might, ultimately, be explained by ideas like string theory. Alain Riazuelo/IAP/UPMC/CNRS hide caption

itoggle caption Alain Riazuelo/IAP/UPMC/CNRS