Envoys for Iran and the United States have engaged in four rounds of talks. But exactly what a deal would look like remained ...

Greenhouse-gas emissions get all the attention, but their effect is manageable and unfolds over decades.

The prospect of a nuclear deal between the U.S. and Iran contributed to the biggest daily drop in oil prices so far this ...

ABU DHABI, United Arab Emirates (AP) — President Donald Trump said Thursday that the United States and Iran have “sort of” ...

A new study published in Physical Review D titled, "Extending the Bridge Connecting Chiral Lagrangians and QCD Gaussian ...

The fast-moving conflict between India and Pakistan last week demonstrated the inherent dangers of the modern nuclear age.

Wall Street is veering lower while oil prices are down more than $2 a barrel as traders bet on a possible U.S.-Iran nuclear ...

Nuclear waste and radioactive plutonium would be assessed as a fuel for reactors under a draft executive order being ...

"We're in very serious negotiations with Iran for long-term peace," President Donald Trump said on a tour of the Persian Gulf ...

US President Donald Trump said on Thursday that Washington is “very close” to reaching a nuclear deal with Iran after Tehran ...

U.S. President Donald Trump said on Thursday that the United States was getting very close to securing a nuclear deal with ...