100-million-years old flowering plants provide oldest evidence of sex

The oldest evidence of sexual reproduction has been found in a flowering plant dating back 100 million years.

Multiple mates increase reproductive success for female prairie dogs

A new study has suggested that mating with more than one male increases reproductive success for female prairie dogs, despite an increase in risks.

Slower and longer sperm most likely to meet eggs

A new study has turned down a conventional wisdom, which holds that the fastest swimming sperm are most likely to succeed in their quest to fertilize eggs.

Sex gives evolutionarily advantages to organisms

Scientists have speculated for a long time on why all living things don`t simply make like amoebas and split instead of having sex.

Pit vipers capable of virgin birth: Scientists

For the first time, scientists have discovered that deadly pit vipers are capable of virgin birth, or have the ability to reproduce without sex like their constrictor relatives.