Biology

Rod-shaped fragments of RNA called “obelisks” were discovered in gut and mouth bacteria for the first time

The engineered “firefly petunia” emits a continuous green glow thanks to genes from a light-up mushroom

From jackals to hornbills, many grassland animals form a deep bond with their partner

The songbirds in your backyard hop around on such itty-bitty legs. Here’s why bird legs are so skinny and how they can support a bird’s weight

Most primate societies have long been assumed to be male-dominated, but a new study shows many have females in charge or feature power sharing

The controversy over a recent paper on human bisexual behavior emphasizes how important it is not to overinterpret genetic studies of sexuality—and how easy it is to do so

Is your dog’s tail-wagging a side effect of domestication, or did humans select for it?

Traits such as face shape, size and sex help predict a dog breed’s life span

Tiny clumps of cells show basic cognitive abilities, and some animals can remember things after losing their head

Special assemblages of minuscule fossils bring dinosaur ecosystems to life

The answer isn’t just about temperature. Our physiology, psychology and clothing choices also factor in

Contrary to popular lore, insects do not confuse artificial light for the moon