Listen to a talk in a geology class. I often hear my friends say that the days pass much more quickly than they used to. But geologically speaking just opposite is true. In fact, a complete day which now lasts 24 hours actually used to be much shorte...
Listen to a talk given by a professor of meteorology. First of all, let's look at why temperatures tend to be higher in city than in the rural area. This happens because almost 50% of the urban areas are comprised of hard surfaces like paved street,...
Listen to part of the lecture in a class on earth science. We've been talking about some of the affects that the human beings so act on the earth. One that you may be not aware of is that we've actually begun to change the length of the day. The othe...
Listen to part of the lecture in a health science class. The professor will be discussing a solution to a health problem caused by a certain parasite sometimes invade humans. A parasite is an organism that live in or on another organism called the ho...
As a way of illustrating our discussion of group behavior of animals. We are going to watch which I think is a fascinating video tape about the eland, one of the two major species antelope in Africa. They live in herds about 200 individuals. But firs...
I like to start discuss today lecture by challenging some of the myths about certain animals considered to be predators of human. Take the case of wolf, people fear wolves because the tales of how wolves attack and eat people walking into the woods....
I like to start discuss today lecture by challenging some of the myths about certain animals considered to be predators of human. Take the case of wolf, people fear wolves because the tales of how wolves attack and eat people walking into the woods....
As we've discussed, the human eye has three different types of color receptors that respond three basic colors: red, green, and blue. Or other colors are seem to combinations of these different types of the receptors. Birds, however, have receptors f...
For the next couple of weeks, we will be focusing on how animals communicate with each other.Up to now, we've had a rather narrow view of vocal warnings that animals give each other. Some recent research indicates that this communication is a lot mor...
Higher animals like dogs, horses, even human being look like their parents when they are born. There are some minor changes that occur as these animals grow. But the basic form and structure stay the same. Now this is called direct development, which...
