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More people are buying marijuana since California legalized its retail sale two years ago. But the scientific research to show consumers the risks and benefits of marijuana use is just starting to accelerate.

The question arises: Since when did so much of our politics have to do with religion? And the answer is, since the beginning — and even before.

Venezuelan opponents and U.S. officials were predicting his demise years ago. But Nicolás Maduro and his Socialist Party remain firmly in power.

An experiment involving dog treats suggests our canine pals may understand the difference when a human withholds a treat by accident and when they do so on purpose. But don't press your luck.

For COVID patients, ECMO is a last-ditch respiratory treatment in which only about half survive. Yet a new small study suggests many lives would still have been saved if there had been more machines.

This weekend is packed with music, art and even science. We've got the City Ballet presenting works by Balanchine, a pairing of science and music at the Salk Institute plus a band raised in National City. And it's your last chance to catch a nostalgic — and unsettling — exhibition at the Athenaeum.

Security analysts are concerned that Russia could launch cyberattacks against Ukraine, as it did in 2017. That could compromise government agencies, banks, and energy infrastructure.

Perseverance, set to land on the Red Planet on Thursday, is carrying the most sophisticated robotic biology lab ever launched and a drone meant to make the first-ever powered flight on another world.

The changed relations between Putin's Russia and Europe are having ripple effects along Russia's border with the EU, including in a town that had prided itself on good relations with Russia.

Luc Montagnier, the scientist who discovered the virus that causes AIDS, has died at 89. His key contribution came at a time when AIDS was mysterious and uniformly deadly.