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Optical illusions are no doubt interesting. At the same time, they often leave people baffled. Just like this optical illusion that may leave you scratching your head. What is even more interesting is ...

Toilet paper is certainly a hot item nowadays. But it doesn’t have to be. In fact, accordin to some people — like musician Sheryl Crow — we use way too much of it. “Now, I don’t want to rob any ...

One million trees worldwide are cut down every day to make toilet paper. Is it more sustainable to grow your own? In Meru, a town in eastern Kenya, a lush, leafy plant sways over the landscape.