Physical Science

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Radioactive Dating: Science or Alchemy?

September 20, 2002

Richard Kerr had some surprising things to say about uranium-lead dating in the Sept. 17 issue of Science1 – surprising, because as a believer in the method and an evolutionist, he admitted there is a fair amount of unscientific methodology and controversy involved. “For years, different laboratories using uranium-lead radiometric dating—the gold standard of geochronology—have […]

Physical Science

Mars Methane May Be Geological, Not Biological

September 20, 2002

Just when the ESA Mars Express spacecraft was collecting data on methane emissions on Mars, leading some to speculate it might be a biomarker, Science Now reported new findings that indicate methane can form naturally in Earth’s mantle by heating water, iron oxide and calcite under pressure (see also Physics Web). This demonstrates […]

Amazing Facts

Harnessing Cellular Machines for Humans

July 20, 2002

The cell is loaded with molecular machines, so why reinvent the wheel? or the whole truck? Martin G. L. van den Heuvel and Cees Dekker wrote in Science that engineers ought to put the existing technology to work.1 The biological cell is equipped with a variety of molecular machines that perform complex mechanical tasks such […]

Health

Sunshine Is for Health

June 20, 2002

51; The old wisdom: stay out of the sun. The new wisdom: your life could depend on getting sunshine: about 10-15 minutes of exposure three times a week. Science Daily reported that Vitamin D, produced in the skin by exposure to sunlight, provides more health to the body than previously thought. Health professionals […]

Cell Biology

Cellular Machines Coming to Light

May 20, 2002

51; As imaging techniques improve, cells are yielding up their secrets. Scientists are getting closer to watching the processes in cellular factories in real time. Dynein: PhysOrg reported, “Biologists capture cell’s elusive ‘motor’ on videotape, solving the mystery of its deployment.” The article began, “Their experiments can be likened to restoring never-before-seen footage to a […]

Cosmology

Is Dark Matter Going Out of Style?

January 20, 2002

Dark matter has been a staple in cosmological theories for decades. One of the initial reasons was that galaxy rotation curves could not be explained without it. Another was that galaxy clusters, to be held together over long ages, needed more “stuff” to bind them. Finally, Big Bang cosmologists invoke copious amounts of dark matter […]

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