The estimate of 5.5 million species of insects is interesting. What’s even more remarkable is that because scientists have found only about 1 million species, that means more than 4.5 million species ...

Insects belong to a phylum called Arthropoda – animals with ... For context, that’s about 100 million years before any of our vertebrate ancestors – animals with a backbone – ever walked ...

For context, that’s about 100 million years before any of our vertebrate ancestors – animals with a backbone – ever walked on land. A species is the most basic unit that biologists use to ...

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ...

Did you know epizootic disease outbreaks in domesticated livestock are just one reason why we have licensed veterinarians? Centuries before the introduction of sheep, cattle, horses, swine, and fowl ...