Get the Popular Science daily newsletterđĄ Breakthroughs, discoveries, and DIY tips sent every weekday. Email address Sign up Thank you! Terms of Service and Privacy Policy. Jonathan Allen, a biology professor at The College of William & Mary in Virginia, has a very strange pet: a very very long ribbon worm (phylum nemertea) named Baseodiscus the Eldest, or just B for short. Ribbon worms, also called nemerteans, are one of the longest animals on Earth, but Allen isnât horrified by his pal. B has been living its best life in…
