This is a video that appeared in "La Nación" online newspaper, Monday, November 9th. By rowing along the Riachuelo, a very polluted river in the city of Buenos Aires, these people claim for its cleaning. What do you think about what these people did?
See how ants help the wounded!
Antoine van Leeunwenhoek - a name we have probably never heard before. Did you know he created the first microscope ever? But it did not loo...
This is a video from the "How Stuff Works" site (excellent place to find all sorts of information!) and it explains how your locke...