"If animals of today evolved from other animals, then why aren't they evolving now?"
Here's a common question some people ask to try to disprove evolution: "If animals of today evolved from other animals, then why aren't they evolving now?" But there is a flaw in this fuzzy logic. The thing is, evolution involves necessity and a lot of time. Man has only been around a short while and not much has changed in nature in the time that man has cared to look. The animals we know of seem to be well adapted to their environment and they haven't had enough time to and don't seem to have needed to develop further in the time we've been watching them. The long dead animals of old (dinosaurs, for example) lived in a different world from the one we know and it was a very long time ago when they were living and roaming about. Those ancient animals didn't just die, they changed as well. Nature is rather unkind to large things and there are a lot fewer large animals than small ones. It only makes sense that the large dinosaurs died and smaller ones had to develop. Survival of the fittest. The large animals were too bulky and required too much food and many of the ancient animals were ill adapted to changes in weather. So, in order for there to be life on this planet, animals had to evolve and adapt and survive. That took a very long time. Much of what we know of is the way it was before our time on this planet, and some of it very well may have developed along with us, we just didn't see it. There is also a good chance that animals have evolved as much as they need to in order to meet their current needs. It is likely that if there was a drastic change on this planet that various animals would adapt and evolve into different creatures over time. Time is the key. Of course we don't see the animals evolving, nobody sits and watches the animals long enough. One individual can't observe thousands or millions of years of life, the average person lives about 70 years.
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