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The Bear Facts

Senate Minority Leader Harry Reid has said at least twice that climate change is causing bears in the Sierra Nevada mountains to change their hibernation patterns. There is no evidence that climate change is actually having such an effect.

Huckabee’s Hot Air on Volcanoes

Mike Huckabee claimed that a single volcanic eruption “will contribute more than 100 years of human activity” toward global warming. This is far from accurate.

Polar Bears and Extreme Weather

SciCheck writer Dave Levitan of FactCheck.org was interviewed by Ira Flatow for a segment on Science Friday about the 10th International Conference on Climate Change.

FactChecking Jeb Bush

Jeb Bush, the brother of one president and son of another, plans to join the 2016 presidential campaign today. It is the first time he has run for national office, so our file on him isn’t as robust as those for some other candidates.

Jeb Bush Off on Contributions to Warming

Jeb Bush claimed that the science is unclear as to how much humans contribute to global warming. The United Nations climate change research organization, however, said it was “extremely likely” that more than half of the warming since 1950 is due to human activities.

FlackCheck Video: Warmest Year

Was 2014 “the planet’s warmest year on record,” as President Obama has said? This FlackCheck video uses an April 20 report from our SciCheck feature to examine that claim.

FactChecking Huckabee, Fiorina and Carson

The Republican presidential primary has three new contenders: former Arkansas Gov. Mike Huckabee; former Hewlett-Packard CEO Carly Fiorina; and retired neurosurgeon Ben Carson.

The Extreme Weather-Warming Connection

Rep. Lamar Smith made several incorrect claims in a Wall Street Journal opinion piece regarding connections between climate change and severe weather.