Morning Report is The Hill’s a.m. newsletter. Subscribe here. In today’s issue: Trump, Iran agree to two-week ceasefire ...

The Lib Dems’ Sue Miller has spent most of her life trying to reduce the risk of nuclear war. And it’s not going well. Why are so few people talking about non-proliferation, let alone disarmament?

Subatomic particles, gravity wells and the beginning of the universe – these are difficult and mysterious concepts that are ...

The White House on Tuesday slammed the notion that the U.S. would use a nuclear weapon in Iran after President Trump ...

Iran on Monday rejected the ceasefire proposal from the mediators, who have called for a 45-day ceasefire. The proposal came ...

Scientists have built an ultra-precise ytterbium atomic clock that could expose cracks in the Standard Model and detect dark ...

For the first time, an international team of physicists has successfully harnessed a rare orbital transition in atoms of ...

Time is almost up on the way we track each second of the day, with optical atomic clocks set to redefine the way the world measures one second in the near future. Researchers from Adelaide University ...

Researchers have shown that a single photon carrying quantum information can travel down kilometers of noisy real-world fiber ...

This story was updated to fix a typo in the date. For the first time in more than a decade, Missouri basketball is going to the NCAA Tournament in back-to-back years. Mizzou was selected to the ...

Physicists at CU Boulder have demonstrated a new kind of vacuum ultraviolet laser that is 100 to 1,000 times more efficient than existing technologies of its kind. The researchers say the device could ...

Twice a year, Americans reset their clocks and lose an hour of sleep. The tradition may feel like a modern nuisance, but it began as a wartime policy during World War I. At 2 a.m. local time Sunday, ...