the.com/arthropod
Nature's answer to armor: no spine, no problem, just build the skeleton outside.
means An invertebrate animal with a hard exoskeleton, a segmented body, and jointed legs — think insects, spiders, and crustaceans.
from From Greek arthron 'joint' plus pous/pod- 'foot' — literally 'jointed foot.' The name was built in the 19th century as naturalists classified the animal kingdom by anatomy, and it stuck because it nails the group's defining feature: legs (and bodies) made of hinged segments rather than one solid piece.
- species count
- over a million described, most of any animal group
- body hack
- must molt entirely to grow bigger
- biomass king
- outweigh humans many times over globally
- ancient lineage
- trilobites were arthropods over 500 million years ago