A commercial fishing boat pulls in its net near Seattle. Strict federal fishing laws have cut back significantly on overfishing in the United States. S.Froebe/iStockphoto.com hide caption

itoggle caption S.Froebe/iStockphoto.com

Scientists use laser fluorescent technology and squirts of dye to test how this jellyfish moves ocean water. K. Katija & J. Dabiri/California Institute of Technology hide caption

itoggle caption K. Katija & J. Dabiri/California Institute of Technology

Researcher Amandine Eriksen arranges the hand bones of a mountain gorilla skeleton. Erin Marie Williams hide caption

itoggle caption Erin Marie Williams