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Publisher: Imaginova Corp. Extra Second Will Be Added to 2005 
 Article describing how and why "an extra second will be added to 2005 to make up for the slowing down of the Earth's rotation. ... The once-common 'leap second' is the first in seven years and reflects the unpredictable nature of the planet's behavior." Includes a list of previous leap seconds added back to 1972 and links to related information. From LiveScience.com, an online magazine "focusing on innovative and intriguing science and technology." http://www.livescience.com/technology/050705_leap_second.html Topics: Ready Reference & Quick Facts, Science Last updated Jan 4, 2006 Live Science
This bright, hip news site "chronicles the daily advances and innovations made in science and technology" with original stories and news feeds, images, and video clips. Topics include animals, health, technology, environment, "science of fiction," history, and strange news. From Imaginova, a publisher of several print and online science publications. http://www.livescience.com/ Topics: Newspapers, Science Last updated Aug 16, 2006 New Advice: Don't Sit Up Straight
Brief article about a study released in November 2006, which suggests that "leaning back is a much better posture" than sitting up straight while working. Includes a description of the magnetic resonance imaging (MRI) study and how "disks [in the back] were least moved when subjects were sitting back at a 135-degree sitting position." From LiveScience.com, a website from a science and technology media and commerce company. http://www.livescience.com/health/061128_backpain_sitting.html Topics: Diseases & Conditions Last updated Jun 7, 2007 25 Secrets of the Mona Lisa
This October 2007 article discusses how scans with a multi-spectral imaging camera of Leonardo da Vinci's "Mona Lisa" peel away "centuries of varnish and other alterations, shedding light on how the artist brought the painted figure to life and how she appeared to da Vinci and his contemporaries." Provides images of her left eye, descriptions of several other revelations, and links to related material about da Vinci and Mona Lisa's smile. From LiveScience. http://www.livescience.com/history/071018-mona-lisa.html Topics: Photography Last updated Oct 29, 2007 Why Has the Date Changed for Start of Spring?
This article describes that while the first day of spring in the Northern Hemisphere traditionally has been celebrated as March 21, the vernal equinox has "landed on March 21, only 36 out of 100 years [during the 20th century]. And from 1981 to 2102, Americans will celebrate the first day of spring no later than March 20." Explains reasons why seasonal dates can vary from year to year. From Space.com. http://www.space.com/spacewatch/050318_equinox.html Topics: Ready Reference & Quick Facts Last updated Mar 11, 2008 Shadowy T-rays: Hunting Tumors and Exploring the Universe
This 2006 article describes how T-rays (terahertz radiation), which exist between microwaves and X-rays on the electromagnetic spectrum, allow researchers to see through "many everyday materials, such as clothing, plastics, and wood [which] look transparent under terahertz imaging." In addition, "T-rays have astronomical applications." Includes images and links to related articles. From LiveScience. http://www.livescience.com/technology/060728_t-rays.html Topics: Science Last updated Aug 8, 2008 |
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