The National Osteoporosis Foundation says a test called Dual-energy X-ray absorptiometry,or DXA, is the best test for osteoporosis.

VOA: special.2010.08.31

He died long before the search for Planet X resulted in the discovery of Pluto.

VOA: special.2010.07.11

The first proposal for this new research vehicle, the X-15, was made in nineteen fifty-four.

VOA: special.2010.07.07

Mister Lowell himself searched for Planet X for two years starting in nineteen-oh-five.

VOA: special.2010.07.11

He decided to seriously search for Planet X.

VOA: special.2010.07.11

The X-15 tested materials for space vehicles.

VOA: special.2010.07.07

He says these include X-ray machines, electronic imaging scanners, laboratory equipment and basic items, such as elevators for hospitals.

VOA: standard.2010.06.01