This small juvenile skunk was caught by Des Plaines, Ill., homeowner Richard Kaulback. He says there have always been raccoons and opossums in the Chicago area, but this year, skunks have become prolific. Cheryl Corley/NPR hide caption

itoggle caption Cheryl Corley/NPR

Cattle and zebra share a meal in a pasture in Kenya. Ryan Lee Sensenig/Science hide caption

itoggle caption Ryan Lee Sensenig/Science

A helicopter ferries a tour boat into Crater Lake at Crater Lake National Park in Oregon. Park management will be evaluating how the noise affects the soundscape and park wildlife. Jeff Barnard/AP hide caption

itoggle caption Jeff Barnard/AP
Mayo Clinic

A worker displays two giant African land snails. For the third time since 1966, the snails are invading the US. Bobbi Zimmerman /AP hide caption

itoggle caption Bobbi Zimmerman /AP

When the T. rex skeleton was first put on display, it was presented standing vertically, in this Godzilla-like pose, as seen at the Carnegie Museum of Natural History around 1950. Recent studies show the dinosaur actually kept its body horizontal. Watch the videos here to see how T. rex walked. Carnegie Museum of Natural History hide caption

itoggle caption Carnegie Museum of Natural History

A healthy gypsy moth caterpillar on a leaf. Outbreaks of gypsy moths damage roughly 1 million acres of forest in the U.S. each year. Michael Grove/Science/AAAS hide caption

itoggle caption Michael Grove/Science/AAAS

A Swainson's thrush flies a mock-migration in the wind tunnel at the University of Western Ontario. Science/AAAS hide caption

itoggle caption Science/AAAS