If you want you can turn any Microsoft PowerPoint presentation into a video so you can play the presentation on a computer that doesn't have Microsoft Office installed.
Galileo Galilei often known as Galileo, was a physicist, mathematician, astronomer, and philosopher who played a major role in the Scientific Revolution. Check your general knowledge.
So far we have only discovered about 5 to 7 percent of the ocean floor and only about a half percent of the whole ocean. Now imagine all the still undiscovered species lurking in depths.
Put your space and general knowledge to a test by answering some questions covering the achievements of mankind in our galaxy and beyond. A simple and intuitive way to build up your knowledge profile.
Nature is everything around us, we are nature and we should be doing
everything in our power to preserve it. Now let's learn about nature in French language.
