I'm Samir Patel, editor-in-chief at Quanta Magazine. Our mission at Quanta is to cover what we call basic or fundamental research in science and math. That means the kind of work that's driven by curiosity and discovery and the search for knowledge. We're interested in how and why everything around us works the way that it does. On our brand new show, the Quanta

podcast, you'll meet the writers and editors behind the magazine, and together we'll explore

the biggest ideas and the tiniest details. Join me for the Quanta podcast, your weekly dispatch

from the frontiers of science and math.

The U.S. is signaling that it's ready to strike Iran. Even if it's just posturing, there will likely still be consequences.

Every war game that I have been involved in in Washington for many years has ended in a

grizzly way.

I'm Carolyn Beeler.

And I'm Marco Wurman. Today, what we know about Washington's intentions and Iran's capacity for retaliation.

Also in Venezuela, jail dissidents are being released, but many in exile cannot return.

The ruling party says they wish opposition leaders could come home.

Oh, they have to say they're sorry.

Plus, one country's all too rare success, making the shift to green energy.

The transition is possible.

And a jazz pianist in New York serenades his native Ukraine.

That's all ahead today on the world.

This is the world. I'm Marco Werman. And I'm Carolyn Beeler. Thank you for being with us today.

Officials from Iran and the U.S. are set to sit down for another round of talks in Geneva tomorrow.

The two sides are negotiating a deal to limit Iran's nuclear program. Iran's

foreign minister said yesterday that his country is willing to make major concessions. Meanwhile,

U.S. warships are surrounding the Islamic Republic. With the military build-up suggesting a possible

U.S. attack on Iran in the near future, The world's Sharan Jafari starts us off today

...