A capped 2-liter plastic bottle containing a clear, colorless liquid is shaken. The liquid turns a deep blue color. At rest, the liquid returns to colorless. The cycle can be repeated many times. Ask ...

At the same time, you and your adult partner should put one drop of yellow and one drop of blue food coloring on the surface of ... Lower the open mouth of the bottle into the cup with detergent.

Jimmy Carter, who rose from humble peanut farmer to president and Nobel Peace Prize winner, dies aged 100 Dozens of 'kamikaze ...