New research from the University of Washington's Friday Harbor Laboratories shows that common assumptions about sea urchin reproduction do not hold true for all species of invertebrates. The work could lead to a better understanding of fertilization among mammals, including the potential to solve some human reproductive problems.

In some places, different sea urchin species breed at different times of the year, or they occupy different ocean depths, so there is only little chance of hybrids turning up. But in other places, such as in the waters off the West Coast of North America, the species ...

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