Geoff Brumfiel

On Wednesday, President Trump tweeted that he modernized the U.S. nuclear arsenal as his first act in office. But others question that claim. NPR takes a closer look at America's nuclear capabilities.

North Korea's government and President Trump have traded threats after North Korea's recent missile tests. And Hadas Gold of Politico discusses pro-Trump news videos on the president's Facebook page.

The Defense Intelligence Agency has concluded, according to The Washington Post, that North Korea has successfully miniaturized a nuclear warhead. Many in the open source nuclear weapons community agree.

Scientists say the iceberg is one of the largest seen by satellites. But the full implications of its separation off remain to be seen.

In 2014, Emily Harrington set out to climb the tallest peak in Southeast Asia. She had to turn back with the summit in sight.

In the late summer of 1982, one man worked around the clock to program the video game version of Steven Spielberg's E.T. in just five weeks. The result wasn't pretty.

In Part 1 of the series Total Failure, a former NASA official recalls the disastrous mission of the space shuttle Columbia in 2003 and how the accident changed his life forever.

Can a nuclear weapon in space fired by North Korea knock off much of the world's electricity? Jeffrey Lewis, of the Middlebury Institute of International Studies, says not really.

The Internet is full of science fiction becoming science fact. NPR Science Editor Geoff Brumfiel is ready to make a stand. Sort of.

An attack on a rebel-held region of Syria on Tuesday has killed dozens of people. Video and eyewitness reports suggest powerful chemical weapons are responsible.

The private company sees Thursday's achievement as a step toward cheaper flights into deep space. The aerospace industry essentially has been throwing away its hefty and expensive rockets.

In an interview with CNBC, President Trump's EPA administrator said he did not believe carbon dioxide is a major contributor to global warming.

The Internet is full of things, including a Reddit subgroup devoted to the act of eating an orange in the shower. We gave it a shot ourselves.

A colorless, odorless liquid, similar in consistency to motor oil, VX kills in tiny quantities that can be absorbed through the skin. It is among the deadliest chemical weapons ever devised.

The Trump transition at the Environmental Protection Agency is off to a bumpy start. External communications have been frozen, and this morning NPR reported that even academic papers by agency scientists will be subject to review during the transition.

2016 was the warmest year on record, according to a new report by the U.S. government. This is the third year in a row that global temperatures have soared above the 20th century average. The report comes ahead of the inauguration of Donald Trump, who has at times, referred to global warming as a "hoax."

A company has submitted a design for what it describes as a "modular" nuclear power plant — a radical departure from other nuclear plants. Each module would be small enough to fit on a flat-bed truck.

Many independent arms control experts suspect that North Korea will test a missile capable of reaching the continental U.S. later this year. There may not be much the U.S. can do about it.

A new analysis of existing data suggests that MH370, which vanished in March 2014, might have gone down to the north of the existing search area in the Indian Ocean.

New satellite photos suggest Russia is preparing to base new nuclear-capable missiles in its Baltic enclave between Lithuania and Poland. The missiles are likely meant as a warning to the West.