Revelations about the center of the Earth

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Revelations about the center of the Earth
Recently, seismologists have observed that the speed and direction of seismic waves in Earth’s lower mantle, between 400 and 1,800 miles below the surface, vary tremendously. "I think we may have discovered why the seismic waves travel so inconsistently there,"stated Jung-Fu Lin. Lin was with the Carnegie Institution’s Geophysical Laboratory at the time of the study and lead author of the paper published in the July 21, issue of Nature.


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All News summaries for July 21, 2005

Spacecraft flies by remote asteroid, camera stops (Update)

Sep 05, 2008 | User rating: not rated yet
(AP) -- The European deep space probe Rosetta successfully completed a flyby of an asteroid millions of miles from earth, but its high resolution camera stopped shortly before the closest pass, space officials ...

NASA delays Hubble mission 2 days due to storms

Sep 05, 2008 | User rating: not rated yet
(AP) -- NASA has delayed next month's space shuttle launch to the Hubble Space Telescope by two days.

Spiky Probe on NASA Mars Lander Raises Vapor Quandary

Sep 05, 2008 | User rating: not rated yet
(PhysOrg.com) -- A fork-like conductivity probe has sensed humidity rising and falling beside NASA's Phoenix Mars Lander, but when stuck into the ground, its measurements so far indicate soil that is thoroughly ...

Cassini Images Ring Arcs Among Saturn's Moons

Sep 05, 2008 | User rating: not rated yet
(PhysOrg.com) -- NASA's Cassini spacecraft has detected a faint, partial ring orbiting with one small moon of Saturn, and has confirmed the presence of another partial ring orbiting with a second moon. This ...

Astronomer Discovers Upper Mass Limit for Black Holes

Sep 05, 2008 | User rating: not rated yet
There appears to be an upper limit to how big the universe’s most massive black holes can get, according to new research led by a Yale University astrophysicist.
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