As prices soar, Japan returns to human waste fertilizer

It's cheap, recycled, and has centuries of tradition: "shimogoe" or "fertilizer from a person's bottom" is finding new favor in Japan as Ukraine's war hikes the price of chemical alternatives.

How is decaf coffee made? And is it really caffeine-free?

Coffee is one of the most popular drinks in the world, and its high levels of caffeine are among the main reasons why. It's a natural stimulant that provides an energy buzz, and we just can't get enough.

NASA set to journey to a metal-rich asteroid

It's a world like no other: a metal-rich asteroid that could be the remnants of a small planet, or perhaps an entirely new type of celestial body unknown to science.

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