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AstronomyDying star illuminates its own shroud
Images of a planetary nebula, taken by the Hubble Space Telescope in 1997 but only recently assembled as a color composite, show a shroud of material cast off and ionized by the dying, sunlike star Henize 3-401.
By Ron Cowen -
ArchaeologyThe Original Cocoa Treat: Chemistry pushes back first use of the drink
Analysis of residues from ancient Maya vessels has revealed that the pots held cocoa almost 1,000 years before its previously known earliest use.
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As I recall, neural networks also require, from time to time, periods of very low input in order to maintain their learning efficiencies.