As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

Did you notice the stunning, colorful sight in the sky Monday morning? It wasn’t a rainbow. It’s called a sundog, a weather ...

Add Yahoo as a preferred source to see more of our stories on Google. While many 'mysterious' natural phenomena have been unraveled by science, there remain a few that sit stubbornly outside our ...

For people with elevated blood sugar levels, (prediabetes or diabetes), monitoring is extremely important, since it helps them keep track of their levels, both fasting and non fasting, and helps the ...