The number of insect species is mind-boggling — and they are a critical part of the environment. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

More than half of all known animal species on Earth are insects — critters with a hard external skeleton, three pairs of jointed legs, antennae and a body divided into three segments (the head, thorax ...

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New research shows invasive species are reducing insect populations worldwide and weakening ecosystems people rely on.