Q: Does the Amazon produce 20% of the world’s oxygen?
A: No. Scientists estimate the percentage is closer to 6 to 9%, and the Amazon ultimately consumes nearly all of that oxygen itself.
Amazon Doesn’t Produce 20% of Earth’s Oxygen
Stories by Jessica McDonald
SciCheck Editor
Trump’s False Auto Industry Tweets
President Donald Trump inaccurately tweeted that his fuel efficiency plan would reduce the cost of cars “by more than $3000” and make them “substantially safer.” Even going by his administration’s analysis — which many experts doubt — he inflated the savings and is wrong about car safety.
Williamson Misleads on Children’s Health, Vaccines
In a July 31 television interview, Democratic presidential candidate Marianne Williamson inaccurately implied there might be a connection between vaccines and higher reported rates of childhood chronic diseases. She is correct that reported rates of chronic conditions in kids have increased over the last several decades, but there is no scientific evidence to suggest vaccines are the cause.
Politics of Gun Violence
In the aftermath of two deadly mass shootings in Texas and Ohio, U.S. political leaders made a series of statements on gun violence that were unsubstantiated, lacked context or were seemingly contradictory. Here we look at some of those statements and present the facts.
FactChecking July’s Round Two Debate
Several of the factual distortions concerned what the candidates had to say about one another.
FactChecking the Second Democratic Debate
The first of the back-to-back Democratic debates in July included spin from the candidates on gun violence, Republican tax cuts, climate change, manufacturing jobs and more.
When Are Heartbeats Audible During Pregnancy?
Q: When is the human heart fully developed, and when are heartbeats audible during pregnancy?
A: A developing heart has all of its primary structures after about nine weeks of pregnancy. Some forms of ultrasound can detect cardiac activity in an embryo in the sixth week, but a heartbeat wouldn’t be audible until about 10 weeks on a Doppler fetal monitor.
FactChecking the Mueller Hearings
While former special counsel Robert S. Mueller reiterated in congressional testimony what he said in his voluminous report on the investigation into Russian interference in the 2016 presidential campaign, politicians reiterated some claims about the inquiry and its findings.
Unpacking Biden’s and Trump’s Big Cancer Promises
On the campaign trail, former Vice President Joe Biden and President Donald Trump have both claimed that a cure to cancer would soon become a reality — if they were elected in 2020. Experts, however, don’t share that degree of optimism.
Does Wind ‘Work’ Without Subsidies?
President Donald Trump has repeatedly questioned the economics of wind energy, saying that wind “doesn’t work” without subsidies. Experts have differing assessments of that. By some metrics, wind power is already competitive with fossil fuels without subsidies. But other measures don’t come to the same conclusion.