For most animals, reproduction is straightforward: Some species lay eggs, while others give birth to live babies. But our recent research uncovered a fascinating mix between the two modes of ...

Take a mama salmon, for example. It lays thousands of eggs at a time which the males fertilize thoroughly. The salmon packs each egg with more yolk compared to an urchin, that means more proteins, ...

The egg was destined to hatch into a dinosaur. Then came the water. Swept away by a storm or knocked into a river, the egg drifted to sea at a time when the Gulf Coast stretched somewhere north of ...

The delicately mannered dance between discerning eggs and vying sperm is more complicated than scientists once believed, and it may hold secrets about the evolution of new species. In a paper ...