Stardust memories: comet Hale-Bopp

Article Abstract:

The Hale-Bopp comet was first discovered on Jul 23, 1995, by independent observers Alan Hale and Thomas Bopp, and since has been observed by many thousands on earth and studied by scientists around the world. Of special interest have been the comet's material and origin.

Cover Story, Observations, Discovery and exploration, Comets, Hale-Bopp (Comet), Hale-Bopp comet

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Stardust in the laboratory

Article Abstract:

Analysis with the ion microprobe reveals two important sources of meteoric stardust: red giants and supernovae. Information about stardust grains provides important information about nucleosynthesis and stellar evolution.

Composition, Meteors, Stars

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"Replay" of hippocampal "memories." (Technical Comments; includes response)

Article Abstract:

The report on replay of rat hippocampal neuronal firing sequences covered temporal bias rather than firing sequences. Opposing views are presented on whether temporal bias is the same thing as temporal order.

Physiological aspects, Neurons, Hippocampus (Brain)

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