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A key medical adviser to the president on COVID-19 defends the travel restrictions as "the right public health call." But others dismiss the move as "remarkably pointless" or, potentially, dangerous.

We're coming back! Season 2 is in the works. While we get that ready, enjoy this shorty episode on the March for Science.

Though anxiety has increased in the U.S. in recent months, a drastic spike in loneliness that psychologists expected hasn't emerged. People seem to be finding new ways to connect, researchers say.

We also discuss the phenomenon of symptom-free cases — how many are there, do we know how much of a role they play in spreading the virus?

We also discuss the phenomenon of symptom-free cases — how many are there, do we know how much of a role they play in spreading the virus?

he Trump administration has quietly added surveillance cameras at the U.S.-Mexico border in response to the coronavirus pandemic. The cameras and deployment of 540 more troops come despite a nine-month decline in apprehensions that indicate fewer people are crossing illegally.

Researchers are using brain scans, blood and spinal fluid to detect early signs of Alzheimer's disease. These "biomarkers" may also offer a quicker way to test new Alzheimer's drugs.

Project Apollo spurred on a technological revolution — everything from advances in food packaging to computers. Fifty years later, we are still reaping the rewards.

Despite a less than robust health system, the African nation has been praised for its efforts to halt the spread of COVID-19.

The physicist's posthumous book highlights his belief in the rationality of nature and on our ability to uncover its secrets — and a faith in science's ability to solve humanity's biggest problems.