With a rare genetic condition called erythrism some insects, like this fluorescent pink katydid, develop an unusual reddish pigmentation. It's not enhanced in any way. The coloration (erythrism) is an adaptation sometimes found among katydids exposed to red or pink foliage, although this one was in the woods off the Appalachian Trail near Mount Peter, N.Y. ...

Nearly 80% of U.S. dairy cows have their horns removed each year to protect their handlers and fellow cattle. But the practice, which is both painful and expensive, has come under increasing scrutiny from animal rights activists. Now, science may be coming to the rescue: A group of researchers announced last week that they successfully edited the genomes of dairy cows to make them hornless. The scientists used the transcription activator-like effector nucleases DNA editing technique to introduce a natural allele linked to hornlessness into dairy cow embryos. Five healthy calves were born, all without horns (above, left), the researchers report in a letter in Nature Biotechnology. The allele - called POLLED - is much more common in beef catt ...