What are monotremes, the rare mammals that lay eggs?
While most mammals give birth to live young, monotremes are the only mammals that lay eggs, representing a unique ...
来自MSN6 个月
Monotremes, the rare and fascinating mammals that lay eggs
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BBC2 年
What are mammals?
The platypus is a mammal that lives in Australia on land and in rivers. Platypuses are one of the few mammals that lay eggs. Aquatic – Any animal that lives or feeds in water. Seals, dolphins ...
Natural History Museum%2c London6 个月
Ten reasons to love echidnas
The fourth is the short-beaked echidna, widespread in Australia yet still difficult to spot. Discover more about these spiky, gentle beings. 1. Echidnas are monotremes - mammals that lay eggs. They ...
Simon Fraser University2 年
Trends in organ systems: reproduction in birds and mammals
Both usually produce few young at one time, and ensure their survival by caring for them. Unlike mammals, birds lay eggs and initial stages of development occur outside the mother’s body. Reproductive ...
BBC6 年
Platypus milk: How it could combat superbugs
The weird creatures have a duck's beak, venomous feet and are one of only two mammals able to lay eggs. Australian scientists discovered in 2010 that the semi-aquatic animal's milk contains a ...
scmp.com10 年
Totally weird things animal mums do
It is one of two mammals to lay eggs, like a bird, instead of giving birth. Like other mammals, the babies are fed milk; but unlike other mammals, the mother doesn’t have nipples, so can’t ...
PBS10 年
Turtles & Tortoises
Turtles are classified as amniotes, along with other reptiles (including birds) and mammals. Like other amniotes, turtles breathe air and do not lay eggs underwater, although many species live in ...