This big egg belongs to an ostrich. Some animals, like lizards, lay much smaller eggs and much more of them. During sexual reproduction a sperm from the male joins with an egg from the female.

How? These animals are among a handful of species that can choose to reproduce sexually or asexually. In other words, they can reproduce with a partner or totally on their own. This is known as ...

The intensification of livestock production systems is a prerequisite to meet the growing demand for animal products. Genetic selection, assisted reproductive technologies and optimized reproduction ...