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Star Trek for Real: Impenetrable Force Field Protects Earth
November 29, 2014
Radiation belts discovered at the dawn of the space age have a new trick in their pocket: shielding the Earth.
Cosmology Could Be Way Off
June 17, 2011
The “lumpiness problem” in cosmology refuses to go away. This old conundrum about why the universe is lumpy with stars and galaxies has been around for decades. The big bang predicts no such lumps. Since the late 1990s, tiny differences in temperature measured in the cosmic background radiation held hope of being the seeds of lump formation, provided theories added copious fudge factors like dark matter, dark energy and inflation. A new survey finds more clumps than expected, casting doubt on whether the fudge factors are wrong, the hot big bang is wrong, or relativity is wrong. Words can hardly express the gravity of the situation when gravity itself – an icon of scientific verity – is called into question.