A boon to robins, gardeners, farmers, fishermen and even grizzlies, earthworms aerate the soil and bore underground avenues for plant roots and water. Ever since Darwin demonstrated in 1881 that the ...

A common parasite expands across species by abandoning sex, boosting short-term spread while risking long-term collapse.

This 30-million-year-long gap is actually rather helpful to Darwin. It means that there was plenty of time for the ancestor ...