Science/Astronomy:

* Scientists Confront 'Weird Life' on Other Worlds
http://www.space.com/scienceastronomy/astrobiology_nrc_040507.html

What are the limits of organic life in planetary systems? It's a heady question that, if answered, may reveal just how crowded the cosmos could be with alien biology.

* Swirling Dust Near Black Hole Too Thick for Theory
http://www.space.com/scienceastronomy/blackhole_vlt_040507.html

A close-up view of a donut-shaped disk of dust around a black hole confirms several expectations about the massive structure but has astronomers wondering how the disk could be so thick.

* Cassini Sees Xanadu on Saturn's Moon Titan
http://www.space.com/scienceastronomy/cassini_titan_040506.html

The Cassini spacecraft has returned its first images of the smog-shrouded moon Titan that reveal surface features, including a bright area euphemistically named Xanadu that so far eludes explanation.

* Hubble Creates Mystery of Missing Galaxies
http://www.space.com/scienceastronomy/hubble_gap_040506.html

A new analysis of a recently released Hubble image found eight of the most distant galaxies every seen. The view reveals the first hints shapes in some of the earliest galaxies and surprising measures of primordial star creation.

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