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Science News for January 19, 1999


Cancer Added To Hangover Headaches

New research suggests that prolonged alcohol intake can lead to cancer risk due to acetaldehyde production, which damages genetic building blocks and is efficiently inserted into DNA in some people. A large percentage of Asians lack the enzyme needed to break down acetaldehyde, making them more prone to esophageal and liver cancers.

SourceAmerican Chemical Society·JournalBiochemistry·DateJan 19, 1999

Large Gene Study Questions Cambrian Explosion

A recent gene study challenges the popular Cambrian Explosion theory, proposing that major animal groups evolved steadily over 1200 million years. The research uses hundreds of gene sequences to calculate evolutionary timelines and suggests that many species existed before their fossils appeared.