Her students can, for the most part, understand the concepts she’s trying to teach. They can memorize and use the Pythagorean ...

Here is a record of 100 fact-checks PolitiFact reporters have written in the Trump administration’s first 100 days. Some of these fact-checks have a Truth-O-Meter rating, which means a group of ...

Fact Check: Hantavirus infection is not a confirmed side effect of Pfizer’s COVID-19 vaccine Hantavirus pulmonary infection is a disease caused by some hantaviruses, not the Pfizer-BioNTech COVID-19 ...

In our work fact-checking political claims and debunking viral deceptions, we have found a tremendous amount of misinformation on the coronavirus pandemic. Here’s a guide to our coverage of the facts, ...

Experts say the virus is typically linked to rodent exposure on land, making the cruise ship outbreak unusual as officials investigate how it spread ...