Evolutionary Biology

During courtship, male black widow spiders snip and bundle up the female's web in their own silk, which discourages other suitors from stopping by. Christopher Intagliata reports

The remains of a preserved 50-million-year-old cell may provide clues to the evolution of earthworms and leeches

Nematode worms hitch rides inside the guts of slugs and other invertebrates, and emerge alive and well after exiting with the rest of the digestive track's products. Karen Hopkin reports

Red algae have shockingly few genes for a multicellular organism - far fewer than a single-celled green alga - and this may explain why they never colonized land.

Male nightingales use singing virtuosity to signal prospective mates that they will be the most doting dads. Sabrina Imbler reports

The disease is linked to genetic changes on the evolutionary road from ape to human

Of the course of nearly 1,200 scientific dives conducted on an expedition to the Philippines' Verde Island Passage, a team from the California Academy of Sciences discovered approximately 100 new species

Mexican Jays compare peanuts to determine which one has the most meat inside before choosing one for a meal. Karen Hopkin reports

Scientific divers aren’t looking to simply fill their collecting bags—they’re seeking scientific value, data that furthers their understanding of a place or process.

A funny thing happened when two Danish college students injected tracking tags into starfish. The tracking tags kept mysteriously winding up on the bottom of the tank.

“Kennewick Man” sequencing points to Native American ancestry

Seven paleontologists weigh in on the science behind the summer blockbuster movie