How black holes morphed from theory to reality

PODCAST: Physicists were mostly skeptical back when the idea of them emerged a century ago from Einstein’s work. The evolution of the evidence, from circumstantial to conclusive, is the quintessential story of science.

Adam Levy • knowable
Jan. 11, 2021 ~22 min

podcast space-astronomy physical-world

How researchers are making do in the time of Covid

The coronavirus pandemic has shuttered labs and sidelined scientists all over the world. Here’s a look at how some of them have coped.

Anil Ananthaswamy • knowable
Dec. 2, 2020 ~21 min

public-health coronavirus psychology society space-astronomy living-world physical-world the-mind reset special-report-reset

Seeking surprises in comets and asteroids

Exploring small bodies in the solar system provides clues to origins

Adam Mann • knowable
Oct. 16, 2020 ~18 min

space-astronomy physical-world

Rodents in space: Keeping bone and muscle strong on the ISS

Researchers helped mice stay mighty with an experiment to counter the effects of microgravity. The gene treatment might also enhance muscle and bone health on Earth — and in humans.

Amber Dance • knowable
Sept. 7, 2020 ~6 min

space-astronomy health-disease living-world

Beyond the twilight zone

Tidally locked worlds are places of extremes. On one side it’s an endless day, the other a perpetual night. Yet scientists speculate that some may harbor conditions that could support life.

Nathaniel Scharping • knowable
July 7, 2020 ~10 min

space-astronomy physical-world

An elemental problem with the sun

For two decades, astronomers have argued over how much carbon, nitrogen and especially oxygen lie within our closest star — a dispute with implications for the entire universe

Ken Croswell • knowable
June 25, 2020 ~17 min

space-astronomy physical-world

Jupiter revealed

The Juno spacecraft has been circling Jupiter since 2016. Here are four things we’ve learned so far about the biggest planet in the solar system.

Christopher Crockett • knowable
June 5, 2020 ~12 min

space-astronomy physical-world

New projects broaden the search for alien signals from space

A longer list of Earth-like planets, eavesdropping on radio waves and looking for laser light shows: All raise the chances of detecting E.T.

Tom Siegfried • knowable
March 3, 2020 ~11 min

technology space-astronomy living-world physical-world in-review

Physicists probe validity of Einstein’s gravity on cosmic scales

New tests could verify general theory of relativity, or find flaws

Tom Siegfried • knowable
Jan. 7, 2020 ~11 min

space-astronomy physical-world in-review

Space is the place for impossible molecules

Compounds with noble gases don’t form naturally on Earth. But in the interstellar medium, they are helping scientists probe the history of the universe.

Ken Croswell • knowable
Dec. 11, 2019 ~15 min

space-astronomy physical-world