Animals
- 			 Life LifeHow insects can help catch rhino poachersA new study looks at which insects can be used as biological clocks to determine when a rhino was killed. By Jude Coleman
- 			 Animals AnimalsPolar bears are being exposed to more pathogens as the climate warmsPolar bears have been exposed to more viruses, bacteria and parasites in recent decades, a new study shows, possibly acquiring the germs in their diet. By Jake Buehler
- 			 Animals AnimalsScience has finally cracked male riflebirds’ flirty secretsNew video upsets the old notion that these birds of paradise use wing clapping to make percussive sounds while courting. By Susan Milius
- 			 Animals AnimalsAt-home experiments shed light on cats’ liquid behaviorCats can flow like liquids through tall crevices, but they solidify a bit as they approach short crannies, new research shows. 
- 			 Animals AnimalsDNA from old hair helps confirm the macabre diet of two 19th century lionsGenetic analysis of cavity crud from two famed man-eating lions suggests the method could re-create diets of predators that lived thousands of years ago. By Jake Buehler
- 			 Paleontology PaleontologyThe largest arthropod to ever live finally has a headFossils of an extinct giant millipede reveal new details about the arthropod’s anatomy. By Jason Bittel
- 			 Animals AnimalsTo tell a right-trunked elephant from a lefty, check the wrinklesElephant trunks, more sci-fi face-tentacle than ho-hum mammal nose, are getting new scrutiny as researchers explore how the wrinkles grow. By Susan Milius
- 			 Animals AnimalsThese sea creatures can fuse their bodiesA species of comb jelly can fuse its body with another jelly after injury. Some of the pair’s body functions then synchronize. By Jude Coleman
- 			 Animals AnimalsSome tadpoles don’t poop for weeks. That keeps their pools cleanEiffinger’s tree frog babies store their solid waste in an intestinal pouch, releasing less ammonia into their watery cribs than other frog species. 
- 			 Animals AnimalsDolphins’ open-mouth behaviors during play are like smiles, a study claimsExperts urge caution in calling bottlenosed dolphins’ gesture a humanlike “smile,” but agree it seems to be important for how the animals communicate. 
- 			 Animals AnimalsCoyotes have the face muscles for that ‘sad-puppy’ lookThe ability to make heart-melting stares may not be the fruit of dog domestication if their still-wild cousins have the power to do it too. By Susan Milius
- 			 Animals AnimalsBird nests made with a toxic fungus seem to fend off attacking antsTwo species of birds in Costa Rica build nests in trees defended by ants. Ants that encounter the horsehair fungus in the nests develop odd behaviors.