At a time when the Democratic Party is calling for fighters, Rep. Valerie Foushee of North Carolina takes a quieter approach. Her work, she said, shou ...

We all have a concept of reality. We know what is “fact” and what isn’t. However, the truth of the matter is that the ...

In a French criminal trial, conventional DNA analysis couldn’t distinguish between twin brothers, but emerging scientific methods could help in such cases.

Learn the distinctions between simple and stratified random sampling. Understand how researchers use these methods to accurately represent data populations.