Start with the Right Tank Size When it comes to setting up a fish tank, bigger really is better—especially for beginners.

Thankfully, aviation buffs have plenty of genuinely ... Internet for "pregnant guppy," you may be more likely to get results describing the care of expectant tropical fish than an airplane.

Aquarium fish like goldfish or guppies are at the lower end of the spectrum. However, on the other end of the scale, the basking shark and frilled shark have gestation periods ... fish that give birth ...

With whales, humans, and other mammals — as well as some fish and even plants like ginkgos and kiwis — males have one Y sex chromosome and one ... such as swimming with a new baby, or obvious external ...

Baby guinea pigs ... deforestation and hunting have placed many gibbon species in danger of extinction. Tequila splitfin. Image by Cedricguppy – Loury Cédric, CC BY-SA 4.0 , via Wikimedia Commons.

Here are our favorite types of freshwater fish you can keep as a pet. If you're in the throes of setting up a home aquarium, ...

It found that women aged 40 and older are now having more babies than teenage mothers. That’s a big shift from even a generation ago — and it says a lot about how our priorities and life ...

"I have 25 species of endangered fish ... endangered species for sale at Saturday's auction, plenty of fish exchanged hands. Guppies, catfish, cichlids and even shrimp and snails rolled through ...

The Tesla boss is said to have demanded she deliver the baby via caesarean section, believing the procedure allows for the child to develop a larger brain, and not to circumcise the baby if it was ...

More and more people are turning to in vitro fertilization, or IVF, to have babies. The process can be arduous, requiring injections of costly hormones twice a day for two weeks to mature eggs so ...