Populations of black bear in particular are spiraling upwards in many parts of the northern half of the U.S., as roads, homes and camping spots infringe on bear territory.
iStockphoto
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Surprise! Not one of these things contains a single speck of blue pigment.
Evan Leeson/Bob Peterson/lowjumpingfrog/Look Into My Eyes/Flickr
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Evan Leeson/Bob Peterson/lowjumpingfrog/Look Into My Eyes/Flickr
Fishermen Ed Stewart (left) and Tannis Goodsen mend groundfishing nets on Merrill Wharf, in Portland, Maine, last November.
Robert F. Bukaty/AP
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One of these penguins is not like the others — the chick in front is really a rover, designed by filmmakers and used by scientists to gather data.
Huddle/John Downer Productions/BBC
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A python embryo turns its leg cells into a pair of penises. Researchers now believe that signals from the embryonic gut trigger the development of the penis in many different species.
Patrick Tschopp/Harvard Medical School/Department of Genetics
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Patrick Tschopp/Harvard Medical School/Department of Genetics
David Roberts says the Cyber-Enhanced Working Dog harness will allow humans to monitor dogs' physical and emotional states remotely, such as in search and rescue operations.
Becky Kirkland/North Carolina State University
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Becky Kirkland/North Carolina State University
The Smithsonian's Jon Blundell scans the fossilized foot bone — the metatarsal — of the Wankel T. rex to help create a digital 3-D image of the long-dead dinosaur.
Nikki Kahn/The Washington Post
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An adult spotted lanternfly is seen, its wings spread to show a colorful hind wing. The invasive pest has sparked a quarantine in Pennsylvania.
Holly Raguza/Pennsylvania Department of Agriculture
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Holly Raguza/Pennsylvania Department of Agriculture
"Even as a paleontologist, I imagine them fighting, I imagine them roaming around; they still fuel my imagination." - Jack Horner
James Duncan Davidson/TED
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A puppy waits at an adoption event in Miami last year. The city is now considering a ban on the sale of puppies in retail pet stores. Cities and towns in several states have passed similar bans, aimed at cracking down on substandard, large-scale puppy breeders.
Wilfredo Lee/AP
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