When mammals have offspring, both in the wild and in captivity, new life is celebrated. This is especially true for species ...

Biologists like to say that reproduction is the ultimate investment, a costly gamble that shapes everything from lifespan to ...

Quite an advantage in today’s world.

New research shows that epaulette sharks, often called “walking sharks,” can produce eggs without increasing their overall energy use.

Sexual reproduction is the production of a new organism from two parents by making use of their sex cells or gametes. The humans, fish, frogs, cats and dogs, all reproduce by the method of sexual ...

Furthermore, the team monitored shifts in blood and hormones while the mother sharks laid eggs, explained lead-author Carolyn ...

In the beginning, no one really understood how babies were made. Thinkers puzzled for millennia about how life arose from one generation to the next. But not until the 17th century did scientists ...