41.   And the Focus FCV runs off compressed hydrogen gas, a complication because hydrogen is volatile, hard to store and hard to transport.

42.   Astronomers believe the universe was created in an immense explosion and that lots of hydrogen gas and much less helium gas ultimately were spread between galaxies.

43.   Astronomers believe the immense explosion that started the universe spread hydrogen gas and much less helium gas between galaxies.

44.   Astronomers said Thursday our Milky Way galaxy is cannibalizing two neighboring galaxies by ripping hydrogen gas out of them.

45.   Fuel cells operate by burning hydrogen gas and oxygen to create electricity without any by-products.

46.   Leinbach said the leak did not create any danger, even though it was a fairly high concentration of hydrogen gas.

47.   The chemical also can produce potentially explosive hydrogen gas when it comes in contact with water.

48.   They were able to generate a modest amount of current for several days when they pumped hydrogen gas into the acid sandwich, called an electrolyte.

49.   There, bacteria ferment the sugar, producing fatty acids and hydrogen gas.

50.   Hydrogen gas or heavy oil appeared to have leaked from a pipe and caught fire at the facility.