2016-09-27T11:01:26ZAcross the globe, human development now fragments a once-continuous landscape into isolated patches of natural habitats.
2016-09-27T11:01:26ZThey're nowhere near as common as they were 100 million years ago, but reptiles are still some of the most distinctive animals on earth.
2016-09-27T11:01:26ZThe mammalian order of primates includes monkeys, apes, lemurs, and human beings. Here are 10 facts about primates that every scientifically literate person should know.
2016-09-27T11:01:26ZWhat exactly is it that defines an animal? Here's a slideshow of the eight main animal characteristics, ranging from multicellularity to sexual reproduction.
2016-09-27T11:01:26ZWhat makes mammals different from other vertebrate animals? Here's a slideshow of the eight main mammal characteristics, ranging from hair to four-chambered hearts.
2016-09-27T11:01:26ZAre you familiar with the 21 orders, or groups, of mammals? This slideshow will take you on a guided tour, ranging from tiny aardvarks (order Tubulidentata) to much bigger whales and dolphins (order Cetacea).
2016-09-27T11:01:26ZTemperate forests evolved 65 million years ago when global temperatures dropped and, in areas further from the equator, cooler climates emerged.