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Genetics

Genes Are Not Telling the Whole Story
October 20, 2002
A growing realization is dawning on geneticists: there is more going on in DNA than previously imagined.  Now that whole genomes are becoming available, scientists are eagerly trying to understand how the genetic code (genotype) produces a full-grown organism (phenotype), like a fruit fly or human.  The interesting stuff in DNA used to be the […]
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Early Man

Dmanisi Homo erectus Fossil Count Grows
September 20, 2002
More bones matching the skulls from the purported Eurasian Homo erectus skulls in Dmanisi, Republic of Georgia have been found (for background, see 08/31/2005 bullet 5, 03/20/2005, 08/01/2002, 11/29/2002).  The find was reported in Nature1 with commentary by Daniel Lieberman in the same issue.2     The bones, including ribs, leg bones and arm bones, […]
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Cell Biology

Subway System Found in Immune Cells
September 20, 2002
The announcement of a “third form of intercellular communication” hit scientists like TNT: tunneling nanotubules, that is.  Science Now reported that “Scientists have found what appears to be a whole new way for immune cells to communicate with one another: long, narrow tubes that enable them to connect and exchange molecules.”  These subway tunnels between […]
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Human Body

Vestigial Organs Have a Function: to Smear Creationism
May 20, 2002
51; Are there body parts you could live without?  Sure; people get by without fingers, teeth, legs, or even brains (figuratively speaking).  Some people think this is proof of evolution.  New Scientist, rather than showing how new organs and structures could arise by mutation and natural selection, listed “five things humans no longer need” as […]
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Genetics

Large Individual Differences Seen in Human Genome
May 20, 2002
What makes each individual unique?  Nature1 reported a surprising thing about “the” human genome that is becoming apparent as more individuals’ genes are examined.  The first part is not surprising; the last part is: When the finished sequence of the human genome was unveiled last year, biologists said that it told a story of harmony […]
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Amazing Facts

Teeth Resist Cracking
April 20, 2002
51; Here’s a story to share with your dentist.  You can crack a tooth, but it takes a lot of force.  This should be surprising, since tooth enamel is as brittle as glass.  The way the enamel develops, researchers found, absorbs excess energy and gives your teeth an extraordinary crack resistance.     “Human enamel […]
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Health

Back to Nature, Back to Health
February 20, 2002
People need access to nature.
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