The sun has a fantastic range of electromagnetic radiation, from high-energy gamma rays all the way to long wavelength radio waves.
“The atmosphere lets through just the light we need,” says Denton, “and the sun puts out just the light we need. It’s a remarkable coincidence.”
A planet needs more than location in a habitable zone. It needs the right ingredients, and salt has a surprising role.
The capabilities of flying animals continue to amaze scientists, and explanations challenge their best efforts. Does evolutionary theory help?
New this year is Wondrous Water, a calendar featuring gorgeous water photography.