Complex algae, animals, fungi and plants all have predictable life histories that separate out three basic aspects of ...

There are also concerns about the legal and moral status of embryos. Many countries currently prohibit growing a human embryo ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Each human is a ...

Unlike other tissues in the human body, human eggs don't pick up as many mutations in some of their DNA as they age. The findings from a new study ...

Hormones are secreted by glands in the endocrine system. During puberty, hormones create changes in physical and emotional characteristics. In this video, Greg Foot describes the interaction of FSH, ...

Researchers have captured the very first real-time, three-dimensional images and videos of a human embryo implanting into collagen designed to mimic uterine tissue —a key stage in reproduction. The ...

Scientists published more than three dozen papers as part of the Human Cell Atlas, an effort to map the human body cell by cell. When you purchase through links on our site, we may earn an affiliate ...