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The cost of a barrel of crude surpassed $100 over the weekend, as war in the Middle East continues to block oil shipments. In simpler, car-commuter terms, gas prices have risen to $4-ish per gallon. But even if the conflict ended tomorrow, they would be slow to fall. Also in this episode: Small business owners remain cautious to hire, community banks struggle to win deposits, and some sectors could see job cuts if the war in Iran continues.

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Today we're resharing an episode from our archive that might feel more relevant with gas prices up. We're going to dig more into those gas prices in the new season of “Million Bazillion: (coming soon). But this is a good time to learn about something called "inflation." After traveling back in time to stock up on snacks, Bridget and Ryan get a chance to try to control runaway inflation … but their ideas don’t quite go as planned.

Domestic migration in the U.S. has been declining for decades. This morning, we'll look into who's still moving, what factors drive their decision, and what's behind the shift. Plus, do wealthy people really flee to tax-friendlier pastures when their taxes go up? But first, there's a sort of backup plan for the oil supply, but the ongoing war in the Middle East means it could soon be under threat, as well.

Oil prices continue their upward climb amid conflict in the Middle East. The international benchmark Brent crude is now $115 a barrel; on Friday, it was $105. Brent is headed for its biggest monthly climb ever, and this morning, there are concerns about additional disruptions to oil shipments through another key route. We’ll unpack. Also: a looming helium shortage and a search for ways to mitigate threats to humanity.

In baseball, calling balls and strikes is a kind of art form. Now, a little more science is being added to the artistry. Major League Baseball has introduced the automated ball-strike, or ABS, challenge system. If a batter, catcher, or pitcher disagrees with the human umpire's call, he can tap his hat. Then, the ABS system uses cameras to say whether the pitch was indeed in the batter's strike zone. Marketplace’s Stephanie Hughes spoke with Nola Agha, professor of sports management at the University of San Francisco, to learn more.