It's time for Round 2 of USA vs. Canada. The hockey powerhouses will meet in the 4 Nations Face-Off championship game. The ...

Artur Beterbiev and Dmitry Bivol headline a seven-fight card on Saturday which features eight current or former champions, including Shakur Stevenson.

In the United States, aircraft are one of the fastest-growing sources of emissions: Emissions from domestic aviation alone have increased 17% since 1990, to account for 9% of greenhouse gas emissions ...