why don't mamals lay eggs like other animals?
436565
There are actually quite a few "other animals" that don't lay eggs -- some sharks have a version of live birth, as do many vipers.  Boa constrictor females retain their eggs (they don't actually "lay" them) until they hatch, so the young come out live.  \n\nThere are egg-laying mammals; they're called Monotremes -- the only ones alive today are the duck-billed platypus & the short- and long-beaked echidna.   \n\nAs for the rest of us mammals, we all still come from eggs, but we've developed an awesome internal incubation system -- just think, now we don't have to worry about eggs rolling out of nests, dehydrating, getting too cold, or being carried away by predators!
229845
there are two mamals that do so....most know that platapus do but the other is a spiny anteater.
105065
There are several.  One is the fact that plants and animals can be categorized.  If the had evolved, there would be no breaking point between various species.  There would be people with various ape-like characteristics.  The truth is that reproduction is limited to animals within groups.  A horse and donkey can make a mule (which cannot reproduce), but a dog and cat have different genetics which prevent reproduction between them.\nThere is also the problem of galaxies which all still act in clusters (gravitational attraction).  Calculating the escape speed based upon rate at which they are moving apart and masses of galaxies involved, the upper limit of 1 millions years for their existance is reached.  Evolutionists attempt to bypass this by stating that most matter in galaxies is invisible...the mass is only 10% of that needed to maintain the integrety of these systems.\nThe volume of meteoric dust on the moon was far less than NASA expected, prompting the first men on the moon to say, "I can see the soles of my shoes".
322480
Birds actually go through the process of fertilizing an egg just like humans, except for birds this happens outside of the body whereas for humans it happens inside the body. So in reality, no actual 'sex' happens for birds...the male bird fertilizes the egg that the female laid, and the female sits on the egg while it gestates. \nGoodluck with that bird porn site, though.
459867
Not all animals have multiple partners.many have the same one year after year.to reproduce. However most of the animals just mate to reproduce and that's all. they just don't go having sex with every species of their kind just have sex,like us wonderful humans tend to do.for animals it's not about how many chicks they can get "laid" by.It's only to keep their species in existence..
1050194
Most animal mothers show a lot of determination in raising up their children.  For example, cheetah mothers spend around 18 months with their mothers learning how to survive.  They may stay for another two years before they really learn how to hunt.  The mother is constantly providing food for the young during that time, and is committed to raising the small number of cubs.  This link has a picture of some animal mothers.\n\nhttp://www.nationalgeographic.com/photography/galleries/mothersday/index.html
217523
Sometimes they can't afford to take care of it (they can't bring enough food to allow the chick's survival).  Othertimes they are stressed, or think for some reason the egg is 'bad', ie the chick is not alive any longer.  It's pretty common.  If the mother gets spooked, she will abandon the nest.
795228
That doesn't sound right, if they're talking about critters that have sexual intercourse at all (as opposed to procreating other ways).\n\nI would think that most females have, as males aren't all that choosy about where they donate their sperm.\n\nToo bad you don't say where you got this. I mean, besides "the net" -- oh, THERE, that tiny place.\n\n;-)\n\nUnless it's more a comment on life expectancy, saying that most critters die before they have a chance to, well, you know.\n\nSo, where'd you come across this tidbit, what animals are included in the statistic, and why would this be?\n\n(I'll check back in hopes you respond.)\n\nEdit: You may (if you're interested enough) want to troll around newscientist.com and similar sites. New Scientist is the UK's version of Scientific American -- the site has science news, and search facility (though you have to pay to access everything, they do have a lot available for non-subscribers).\n\nI may give it a go next time I'm there.\n\nTrouble is, coming from a non-expert (that is, a psychologist), I wonder if this is one of those non-facts that gets picked up and repeated and is completely wrong.\n\nThough, if you include all animals, including insects, then maybe. Relatively few bees and ants, for example, have sex, and they'd account for a big proportion of "all animals."\n\nIn which case it's completely irrelevant to a discussion of human sexuality.
949151
Research a little. Many of the other species of animal are monogamous.
1161690
Because they do not have a gastrointestinal tract like higher animals do.
531960
The duck-billed platypus is one of the very few mammals who lay eggs.It comes under the category of mammals because it has mammary glands present. The duck-billed platypus has both the features of a reptile as well as a mammal, thus it stresses on the fact that mammals have come after reptiles in termas of evolution and mammals have gradually evolved into themselves through reptiles which act as a connecting link.
131428
no they dont lay egg they carry the eggs in a pouch til they are ready to hatch
801674
No, they dont. Birds have a different "set up" as far as sex goes. Both sexes look the same, just a single opening. This is used for both elimination and sex. The male mounts the back of the female. He twists his back end around and both openings, called the cloacals, touch. He releases the sperm into her and thats how fertilization takes place.
775744
Turkeys are notable for their ability, rare amongst higher species, to reproduce asexually. In the absence of a male, female Turkeys are known to produce fertile eggs. The individual produced is often sickly, and nearly always male. This behaviour can interfere with the incubation of eggs in Turkey farming[1].\n\n\nYou could get more information from the link below...
287745
The Smithsonian Institute -- Peacocks are male, and cannot lay eggs.  PeaHENS lay eggs!
64165
according to the geographic history. we have lots of dinosaurs laying eggs on earth even before the chickens arrive and laye their own eggs. therefore eggs come first before chickens.. hehehe...
569367
Since they don't take care of their eggs, there is a greater probality that their eggs will be eaten up by predators etc and won't survive!\nThus they lay more eggs to ensure the continuity of their species.