Many of us have blindly followed this advice for our entire lives, not knowing where it came from or why we need eight glasses of water. Apparently, the eight-by-eight rule came out of a void ...

Many of us have blindly followed this advice for our entire lives, not knowing where it came from or why we need eight glasses of water. Apparently, the eight-by-eight rule came out of a void ...

Which is why we need to look after it. Take this little bean. These usually grow in the ground but they can also grow in your classroom. They need soil, or a paper towel, sunlight and water.