Uncategorized
- Space
Saturn’s rings tell a comet’s tale
Ripples made by a celestial impact 600 years ago can still be seen today.
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Mathematicians think of everything as rubber
How the rubbery world of topology may help describe the universe.
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Letters
Lumpy lunar illusion Are you folks aware of a phenomenon based on the universal expectation that objects are illuminated by light coming from above? Several startling optical illusions are based on this quirk of the mind. For example, the sharp moon map in “Orbiter delivers sharp moon map” (SN: 7/30/11, p. 12) makes the moon […]
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SN Online
BODY & BRAIN ‘Normal’ B12 levels may not be enough for the brain.
