And how do scientists go about answering that question?

The potentially-invasive moth hasn’t been seen in a century.

Researchers also tried placing the worms on pigeons as part of a study aiming to uncover how the tiny invertebrates ended up all around the world.

Research in recent decades has explored how animals other than humans perceive different numbers of objects

While regeneration has long been the domain of colonial tunicates, a solitary species of sea squirt was able to regenerate into multiple, fully functional individuals within a month of being cut up.

An experimental study explores how plant communities may be affected by future declines in invertebrate populations.

The retired University of California, Santa Cruz, professor was known for his work on invertebrate reproduction, kelp ecology, and Antarctic marine life.

The invertebrate predators prey on and lay their eggs near emerging tadpoles, potentially threatening the conservation of endangered frogs, researchers find.

Without access to their mothers’ milk, Toxeus magnus offspring die within the first 10 days of life.

Scientists work to help relocate colleagues who lost everything.

Researchers have recently identified a many-legged invertebrate from the Silurian period.

As the only woman who has piloted the deep-ocean research submersible Alvin, Van Dover is among the few researchers to have explored hydrothermal vents firsthand.

A study of 13 starfish species reveals that even animals that live at depths where sunlight doesn’t reach have functioning eyes.

Marine species survived rafting thousands of kilometers on debris swept into the water by the giant wave, scientists say.

These millimeter-size sea creatures lived 540 million years ago.

Electrical shocks cause a physiological stress response in invertebrates previously thought incapable of feeling pain.

Researchers have found the New Guinea flatworm, one of the world’s most invasive species, in Florida, putting native ecosystems at serious risk.

Researchers discover a densovirus that is associated with sea star wasting disease.

Extinct, giant arthropods, long assumed to be top predators of ancient seas, didn’t have sharp enough eyesight to be refined hunters.