What is an El Niño? And what potential impact could it have for California? Daniel Swain explains. The California Weather Blog.

Stanford scientists reconstructed the effects of an enormous 3.26-billion-year-old asteroid impact on Earth. From Wired.com.

Daniel Swain writes that despite recent storms, most of California is still below 50% of average for this time of year.

Noah Diffenbaugh tells National Geographic that "In the U.S. we have seen acute effects of severe heat on corn, cotton, and soy yields."

David Lobell says the impacts of climate change "are already evident in many places in the world."

Chris Field says that adapting to the realities of climate change is "just going to be something that great nations do."

E-IPER's Michael Ovadia writes about how owning less made him happier and depending on others made him more social.

Robert Jackson says the old, decaying cast-iron pipes that transport natural gas beneath many cities are disasters waiting to happen.

Robert Jackson says the old, decaying cast-iron pipes that transport natural gas beneath many cities are disasters waiting to happen.

Noah Diffenbaugh is one of 13 climate science experts who created the What We Know campaign, aimed at communicating the reality, risk and response of climate change to the public.