It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?

Plus, they are a handy ingredient, binding compounds together and providing structure ... no role in egg production, so they are gassed, threshed, or crushed after hatching. Female chicks have ...

A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

Transposons, also known as jumping genes or mobile genetic elements as they can replicate and reinsert themselves in the ...

Although the egg is resistant to slow, evenly distributed pressure, it is vulnerable to sharp, concussive pressure. It has to be. Neonatal chicks weighing a tenth of a pound peck their way out. Just 5 ...

Animals are finely adapted to their native habitats, but when they are introduced to other ecosystems, they can become ...

And a number of species only eat bird eggs, swallowing them whole, then using structures on their spines to crush them ...

Katherine Heigl's net worth is estimated to be around $30 million, according to Celebrity Net Worth. Related: 'Grey's Anatomy ...

I felt a wave of disappointment last August when I opened my front door on a Saturday morning to find an adult spotted ...

Fossils are providing more and more clues about how dinosaurs attracted one another and reproduced, which contributed to their remarkable ability to populate much of the Earth ...

Palm Beach County is the latest in a string of Florida districts that have ended or drastically changed their sex ed curriculum amid increasing pressure from the state to focus on abstinence ...

Penguins and parrots are nesting on eggs at the Erie Zoo, which wants to welcome not only baby birds this year but also a new event called Glow Wild.