The Ming Dynasty ships used magnetic compasses similar to those used today.

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Happened to me today.

Cheng Sixiao, Ink Orchids, Yuan dynasty.

In the box on upward social mobility on page 82, we discussed how Latinos face a similar situation. ...

The steel lamination used in an E coil helps increase the magnetic field strength, which helps the ...

Magnetic Reversals and Seafloor Spreading

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