Naut's Tidbits & Snippets

Friday, March 16, 2007

Vasectomy Anyone?

Sandra Weintraub, a clinical neuropsychologist at Northwestern University in Chicago, did a study investigating the possible link between men having a vasectomy and experiencing cognitive impairment, specifically Primary Progressive Aphasia, later in life. 40% of PPA patients had a vasectomy, 16% of... Sign in to see full entry.

More Dark Matter

The Dark Matter Rap My name is Fritz Zwicky, I can be kind of prickly, This song had better start by giving me priority. Whatever anybody says, I said in 1933. Observe the Coma Cluster, the redshift of the galaxies imply some big velocities. They're moving so fast, there must be missing mass! Dark... Sign in to see full entry.

Thursday, March 15, 2007

On Dark Matter

You've heard about 'dark matter', haven't you? One conjecture is that it is very much like a neutrino. Recent calculations suggest that the Milky Way is immersed in dark matter with a density of possibly 10 to the power of 5 particles per cubic meter of space! So the 'ether' of old is making its... Sign in to see full entry.

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