Animals
- 			 Animals AnimalsHow the ghost shark lost its stomachThe lack of a digestive organ in fish and other animals is linked to genetics. By Susan Milius
- 			 Animals AnimalsHow koalas sing lowExtra set of vocal cords lets males hit surprisingly low notes. By Beth Mole
- 			 Animals AnimalsDNA study reveals new wild cat species in BrazilA new small cat species, Leopardus guttulus, was discovered in Brazil, hiding in plain sight. The oncilla, researchers say, is really two kinds of cat. 
- 			 Animals AnimalsInsect form of sexual frustration takes tollSmelling female fruit flies but not mating with them can actually shorten males’ lives. By Susan Milius
- 			 Ecosystems EcosystemsCannibalistic mantis invades New Zealand, eats nativesNative male New Zealand mantises try to mate with females of an invasive species, only to find out the hard way that those females eat their mates. 
- 			 Animals AnimalsTo study turkey instincts, consider robot turkeysIn 2004, Australian researchers built robot turkeys to study the instincts of Australian brush turkey chicks. Robots can be a useful way of learning more about animals, but the use of robots has yet to take over in animal behavior studies. 
- 			 Animals AnimalsOdd head of seahorse cloaks its sneak attacksHead shape creates hydrodynamic fake-out for stealth hunting. By Susan Milius
- 			 Genetics GeneticsDNA changes may show how whales adapted to waterComparing the genetic material of whales has revealed DNA changes that may have helped the animals adapt to aquatic environments. 
- 			 Agriculture AgricultureProbiotics may protect piglets from E. coli infectionBeneficial bacteria could replace antibiotics in pig feed. By Beth Mole
- 			 Animals AnimalsMalformed frogs rarer than thoughtFrogs with skin cysts or shortened or missing legs make up only 2 percent of the amphibians collected during a 10-year study. 
- 			 Animals AnimalsGreen sea slugs aren’t solar powered after allSeveral species of sea slugs hold on to algal chloroplasts, digesting them weeks or months later. Scientists assumed the creatures were able to use these chloroplasts to make their own food in lean times. A new study finds that at least two of the species aren't solar powered after all. 
- 			 Animals AnimalsComb jelly immune system can spot old enemiesAnimal at base of family tree could help researchers understand the evolution of immunity. By Susan Milius