In cicadas, a world of microbes has evolved to provide them nutrients. Researchers at the University of Montana have discovered that a cicada bacterial endosymbiont, Hodgkinia cicadicola, has split into at least two dozen lineages within cicada cells, in an apparent case of nonadaptive evolution.
Male and female Bicyclus butterflies have different levels of the hormone ecdysone, which regulates their different-sized eyespots.
By Viviane Callier One of evolution’s oldest tricks is to apply old genetic building blocks at new times or places in development to create a new structure. But that isn’t […]
By Viviane Callier Beetle horns are tremendously varied structures, both within and between species: some beetles have them, some don’t. The ones that do have them have evolved many special […]
By Viviane Callier Insulin, the hormone that controls blood glucose in humans, is also produced by insects and, according to a study published in Nature, two different insulin receptors convey […]