Mammals are a class of animals characterized by being vertebrates, being covered with hair, being...
Animals are incredible beings, capable of living both in water and on land, mammals being no exce...
On planet Earth there are the most diverse animals: from microscopic animals like the flea, to hu...
Learn about the solar system with this hands-on video lesson from a TEACHER. If you are also wond...
Image: Google SitesThe animal world is full of unique animal groups, some of them having been on ...
NASA's Spitzer Space Telescope has allowed a group of California scientists to conduct a study of...
Venus is an amazing planet For many reasons, and although it is similar to Earth in some ways, it...
Image: SlidePlayerOne of the most important characteristics of living things is their ability to ...
Image: SlideshareAmphibians are very interesting and varied animals. The word amphibians means "t...
The parasites they are very diverse organisms ranging from microorganisms to insects and birds. I...
The vegetables (the plants) They are a very numerous and very ancient set of organisms, since the...
The multicellular organisms with specialized tissues they need to have some kind of messenger tha...