Researchers have been sending animals to space for decades, and the growing roster includes everything from dogs and monkeys to scorpions and jellyfish. But a more recent animal space traveler returned to Earth with something never before seen: an extra head.
The newly bi-cranial creature is a flatworm of the species Dugesia japonica, one of 15 flown above the International Space Station for five weeks by Tufts University researchers. The flatworms were cut in half before being launched to study their unique regenerative abilities. Severing a flatworm usually just results in two identical flatworms, but something appears to have gone awry in one individual, who returned with another head where his tail should have been.
This behavior has been observed before in the species, but it’s exceedingly rare — the Tufts researchers say they’ve never seen it happen before, even after 18 years of working with a colony that now ...
