Animals “discovered” land well over 450 million years ago. Arthropods (joint-footed) are the earliest known terrestrial animals. The evidence lies in the fossilized trackways of some type of arthropod ...

“The truth is that we’re all living with this vast diversity of arthropods and the majority of them are not overtly harmful,” study coauthor Michelle Trautwein of the California Academy of Sciences ...

The first study to evaluate the biodiversity of arthropods in U.S. homes finds that humans share their houses with any of more than 500 different kinds of arthropods - at least on a short-term basis.

Trilobites first appear early in the Cambrian and are one of the earliest examples of arthropods, the group that includes all insects. They flourished for over 100 million years, leaving fossils that ...