Joe Palca

On March 10, Rep. Sheila Jackson Lee held a news conference at the Good Neighbor Healthcare Center in the part of Houston she represents. The mayor and a bevy of other state and local officials stood behind her.

One of the most puzzling astronomical discoveries of the past decade has just gotten a little bit clearer. Astronomers still don't know what's producing the brief, powerful bursts of radio waves they've been detecting, but for the first time, they've been able to see where one of them is coming from.

Astronomers first detected these so-called fast radio bursts in 2007. Until now, all 16 FRBs that have been reported have been found by combing through archival data.

If this were a Sherlock Holmes story, its title would surely be "The Case of the Disappearing Quasar."

Lithium-ion batteries are extremely popular because they are lightweight and pack a lot of power.

What's the universe made of?

It's a question that's been bothering scientists and philosophers for millennia, and has become even more vexing in recent decades, as physicists have become convinced that most of the universe is made of something we can't see or touch or measure.

At least not yet.

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