David Perlman, Chronicle Science Editor
A new spacecraft more powerful and sophisticated than any other is flying flawlessly toward Mars, and its date to begin orbiting the planet on March 10, NASA officials reported Thursday.
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Browsing Posts in Science/Technology
Reuters
In the conventional view, the earliest mammals were small, primitive, shrewlike creatures that did not begin to explore the world’s varied environments until the dinosaurs died out 65 million years ago.
But scientists reported Friday that they have uncovered fossils of a swimming, fish-eating mammal that lived in China fully 164 million years ago, well before it was thought that some mammals could have spent much of their lives in water.
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