5 – Hold the egg rolls!  A new study warns that Chinese food has far too much of this mineral which can lead to hypertension. 

10 – Most of the world’s ice is found on the continent of Antarctica and on this misnamed island. 

15 –Researchers have found evidence on the Y chromosome of this third U.S. president that links him to relatives living in England today.

20 –When Percy Spencer walked near a magnetron and discovered that a chocolate bar in his pocket had melted, he’d discovered the workings of this now common kitchen appliance. 

25 – The Space Race between the USSR and the US began in 1956 when the Soviets launchedthis satellite.