sperm

Sperm Hoarders: Why Animals Store Semen

Female guppies (Poecilia reticulata) sometimes bring a little extra baggage to a relationship—in the form of a dead male’s sperm. A new study shows that one in four wild guppies in Trinidad and Tobago are fathered by the ...

Sperm Hoarders: Why Animals Store Semen

Female guppies (Poecilia reticulata) sometimes bring a little extra baggage to a relationship—in the form of a dead male’s sperm. A new study shows that one in four wild guppies in Trinidad and Tobago are fathered by the ...