21.   In Seattle Wednesday, much of the energy from the earthquake had dissipated by the time it reached the surface.

22.   Magma that reaches the surface is called lava, and volcanoes are built from accumulated lava, rock, ash and dust.

23.   Once it reaches the surface, these energy particles take eight minutes to reach Earth.

24.   Perhaps, scientists say, the bizarre Swiss rocks point to an entirely new way such prizes could be processed and reach the surface.

25.   Scientists have yet to find the center where magma reached the surface.

26.   The air near the ground will stay relatively dry, so many of the showers falling from these clouds will evaporate before reaching the surface.

27.   The ashes will reach the surface of the moon in about a year when the unmanned Lunar Prospector spacecraft runs out of fuel.

28.   The cloud would obstruct sunlight from reaching the surface, cooling the initially warm region.

29.   The chondrites usually burn up before reaching the surface, or turn to mud or dirt when they come into contact with water.

30.   The Russians did not say whether the distance was meters or kilometers or whether the poisons had reached the surface.