Pregnancy

With most targeted changes not mammoth-specific, the focus is on gene editing.

The mice were created by Colossal Biosciences, which edits DNA for species conservation, and has been working to bring back the woolly mammoth since 2021.

The animals, the first to have been created by Colossal Biosciences, have fluffy coats and curly whiskers.

Biohacker Josie Zyner's new company, Los Angeles Project, is creating a new generation of gene-edited pets.

The Columbus Zoo and Aquarium in Ohio announced this week that for the first time in the zoo's history, two elephants are pregnant at the same time.

Humans are not the only organisms that have periods — some animals do too, but scientists still aren't sure why.

Cape May County Zoo has a new addition! On April 22, a zebra at the zoo gave birth to a female foal.

Though the pregnancy of Charlotte, a captive round ray in North Carolina, seems to suggest that stingrays and sharks are capable of mating, scientists say otherwise.

Charlotte, a rust-colored stingray the size of a serving platter, has spent much of her life gliding around the confines of a storefront aquarium in North Carolina's Appalachian Mountains.

A surprising discovery of a live newborn great white shark near California challenges shark birthing mysteries, documented in a recent paper, prompting round-the-clock surveillance for further evidence.

New baby elephant Corra was recently born at Walt Disney World. The 218-pound baby was born to a mom who was also born at Walt Disney World, a first.

Researchers have grown humanized kidneys in pigs, a breakthrough with the potential to address organ shortages in transplantation, though ethical and technical hurdles persist.

Many of us love seeing an echidna. Their shuffling walk, inquisitive gaze and protective spines are unmistakable, coupled with the coarse hair and stubby beak.

Believed to have gone extinct at the time of the dinosaurs, the coelacanth has one of the longest gestation periods on Earth — and it can hunt in a headstand...

Manatees typically mate between March and September.

Get excited for the 35th official Shark Week, from July 23 to July 29, with these shark facts.

Environmental authorities estimate that the population of the beasts has ballooned to about 130 — and with no natural predators, it could more than triple by 2031.

Fossilized bones help tell the story of what human beings and our predecessors were doing hundreds of thousands of years ago. But how can you learn about important parts of our ancestors' life cycle – like pregnancy or gestation – that leave no obvious trace in the fossil record?The large brains, re...

Fitness trackers and fecal samples: How St. Louis Zoo scientists are helping exotic cattle reproduce.

Tigers are at home in the tropics or in the snow.