The philosopher Karl Popper pointed out that most early practition­­ers of science were justificationists. They didn’t just seek out any old knowledge; they were on the hunt for justified knowledge.

A recent letter to the editor stated that “the science is settled; we’re cooking the planet.” True science is never “settled” and many scientific errors have been accepted by the “experts” through the ...

Any trip to the dark night skies of our Southern California deserts reveals a vista full of wonder and mystery — riddles that astrophysicists like myself spend our days unraveling. I am fortunate to ...