fertilization

Why Self-Fertilising Worms Have Shorter Lifespans 

Why Self-Fertilising Worms Have Shorter Lifespans 

Self-fertilisation isn’t uncommon in the animal world. Nematode worms have made the switch from sex to self-fertilisation several times. A new study found that switching to self-fertilisation shaves time off lifespans in a population, and researchers have a few ideas as to why.