In fact, in the same paper analytical device, the researchers created another collection zone that quantifies the presence of nitrite, another dangerous contaminant in water. Printing and melting ...

while it takes about 37 gallons of water to make a single roll of toilet paper. Americans spend $40 to $70 a year on average for toilet paper and use approximately 34 million rolls of toilet paper ...

The paper clip is on the water but is not floating like a boat which is less dense than water. The paper clip is more dense than water but can rest on the surface of the water because of the water's ...

Since his return to office, Donald Trump has worked to redefine 'reality' and put his stamp on American life. What's behind his unusual moves?

So when a government official finally invented paper in AD105, it was a big deal. It involved mashing up a bizarre concoction of cloth, bark and nets with some water to form a paste, and then ...