What animal has the longest gestation period? From salamanders to elephants, here's how long it can take to make a baby.

“This is the first study that shows a shark embryo’s ability to detect and ‘hide’ from a predator”—presented in the study as predator-mimicking electric fields—“by staying completely still and ...

A huge variety of animals produce eggs. These help to protect and provide for offspring as they develop. There are over 500 species of shark living in waters around the world and the majority give ...

Around 40% of species lay eggs and the tiny embryo gets all its nutrients from a yolk. When all the yolk has gone, the shark will hatch as a fully formed miniature shark. Around 10% of species ...

“Shark embryos are already very vulnerable in their mermaids purses and our study suggests that one of their key survival strategies - freezing to hide from predators- may be significantly reduced by ...

It is among the roughly 40 per cent of sharks that reproduce by laying a tough, leather egg case that contains an embryo. These shark embryos are highly sensitive to changing ocean conditions ...