Sperm and egg cells, or gametes, are unusual. Egg cells are some of the largest cell types, and sperm are some of the smallest. In humans, these haploid cells come together to form diploid cells. It's ...

Life cycles require the creation of an autonomous individual, that individual’s growth and that individual’s reproduction In ...

An intriguing new theory of evolutionary biology says the reason sexual reproduction may be so successful is that it promotes genes that work well in combination with many other genes. This idea of ...

Reproduction involves making quality gametes – egg and sperm – which are essential for species continuity and therefore have huge implications for human health. The quality of the gametes is not only ...

The California condor is one of the rarest birds in the world, but now it seems that nature is giving it an unexpected leg-up. Scientists have discovered two condor chicks that were born from ...

Scientists at the Research Institute for Farm Animal Biology (FBN) in Dummerstorf and the University of Udine have detected ...

A University of Hawai'i at Mānoa graduate's new research reveals that plastic pollution poses a significant, unseen threat to ...

Photos and video are available to download in the Zoo’s newsroom. The Smithsonian’s National Zoo and Conservation Biology Institute community is mourning the loss of Shanthi, beloved member of its ...

New research has resulted in the first high-resolution molecular picture of the equine endometrium—the inner lining of the uterus—before and after embryo implantation. This picture, or cell atlas, ...