The 12-year-long endeavor reveals Prometheoarchaeum as a tentacled cell, living in a symbiotic relationship with methane-producing microbes.

To see if the spiky fish shares signaling pathways found in other organisms, scientists scooped up specimens during a mating frenzy on the shores of Japan.

The brain wiring behind scent processing seems to scale across mammalian species.

Mutating a gene called CMAH in mice so it’s nonfunctional, as in humans, upped the animals’ chances of developing heart disease, a study finds.

The protist Rhodelphis limneticus bears little resemblance to its close genetic relative, red algae.

Insect eggs can take any shape at almost any size, refuting explanations for their dimensions based on geometric scaling laws or on relationships between egg traits and adult traits.

Bonobos eat their aquatic greens, perhaps to get their daily dose of iodine.

The DNA of a whale shows its father was a beluga and its mother was a narwhal.

Dogs have stronger facial muscles compared to wolves, giving them the sad or “puppy dog eyes” look.