Tech Insider
A black-and-yellow Joro spider in a web
Joro spiders are an invasive species in the US, but they aren't as scary as they seem.
Tech Insider
A refal hog misses the trap, and roams free at Barker-Addicks reservoir on Thursday, Sept. 18, 2014, in Houston.
Wild pigs already cause billions of dollars in damage to agriculture in the southern US.
Tech Insider
Green beetle; beaver-like rodent; hammerhead worm
These weird invasive species can damage crops and soil and threaten native plant and animal species.