Wait, what?: If NASA and/or Borenstein thinks that two planets with temperatures maybe 100F apart are both "ideal for life", why should we get all worked up if the Earth's temperature fluctuates by a couple of degrees?

Seth Borenstein:  NASA sees distant planets that seem ideal for life

WASHINGTON (AP) — NASA's planet-hunting telescope has discovered two planets that seem like ideal places for some sort of life to flourish. They are just the right size and in just the right place near their star.

Kepler mission makes big splash with possibly habitable super-Earths - Cosmic Log

If the planets had atmospheres like Earth's, Kepler-62e's surface temperature would be 86 degrees Fahrenheit (30 degrees Celsius), while Kepler-62f's temperature would be 19 degrees below zero F (-28 degrees C), Borucki said. "You'd see the sun being substantially larger than our sun, because it's so much closer," he said. "But it'd be darker, like walking around on a cloudy day."

In their research paper, Kaltenegger and Sasselov assume that Kepler-62e has a slightly cloudier atmosphere than Earth's, and that Kepler-62f has a thick carbon-dioxide atmosphere with a strong greenhouse effect.