I have always been startled and fascinated by the sandlike abundance of galaxies sprinkled across the night sky. The most sensitive optical image ever made by human beings, the Hubble Ultra Deep Field, captures some 10,000 galaxies in an area about 1/100th the size of the full moon
Read More »Tag Archives: over-the-years
Feed SubscriptionGarrett Lisi responds to criticism of his proposed unified theory of physics
This past December Jim Weatherall and I wrote " A Geometric Theory of Everything " for Scientific American , describing progress on unified geometric theories of gravitation and the Standard Model of particle physics. My personal contribution to this progress, a developing model called E8 Theory, was introduced three years ago in a paper titled " An Exceptionally Simple Theory of Everything ." Almost immediately after this paper appeared, physicists and the interested public began a lengthy process of considering and discussing this new theory's merits and faults. Not surprisingly, the initial response was largely critical, with most commenters encountering some unfamiliar mathematical structures in the paper and responding with appropriate skepticism
Read More »A New Way to Pay With Credit Cards
Credit card design has not changed much over the years. Now, Citibank is ushering in a new breed of credit cards with built-in computer chips.
Read More »Seconds Before the Big One (preview)
Earthquakes are unique in the pantheon of natural disasters in that they provide no warning at all before they strike. Consider the case of the Loma Prieta quake, which hit the San Francisco Bay Area on October 17, 1989, just as warm-ups were getting under way for the evening’s World Series game between the San Francisco Giants and the Oakland A’s
Read More »Video: Are we in a culture of divorce?
Life coach and writer Jill Brooke discusses how the stigma of ending a marriage has changed over the years and whether it’s become more socially acceptable. (TODAY show)
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