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Like many students at Douglas High last week, 15-year-old Christine Yared heard a fire alarm and started outside.

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Updated at 8:58 a.m. ET

Venezuelan President Nicolas Maduro has offered an overture to his U.S. counterpart on Twitter, using President Trump's preferred medium Monday to ask for talks between the two countries.

Trump "campaigned promoting non-interference in other countries' domestic affairs," Maduro tweeted, tagging the U.S. president's account. "The time has come to fulfill it and change your agenda of aggression for one of dialogue.

A grocery store's baby formula aisle often stocks an overwhelming number of options. Aside from different brands of pastel-hued tins and tubs, there are specialized formulas — some for spit-up reduction, gas or colic. And in the past decade or so, companies have introduced formulas meant for toddlers who are leaving bottles behind.

Russian curler Alexander Krushelnitckii, who won a bronze medal at the Pyeongchang Olympics, has tested positive for a performance-enhancing drug at the Winter Games, a spokesman for the Olympic Athletes from Russia team says. The team says it will investigate to learn how the banned drug came to be in the curler's system.

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In 1984, two men were thinking a lot about the Internet. One of them invented it. The other is an artist who would see its impact on society with uncanny prescience.

First is the man often called "the father of the Internet," Vint Cerf. Between the early 1970s and early '80s, he led a team of scientists supported by research from the Defense Department.

Initially, Cerf was trying to create an Internet through which scientists and academics from all over the world could share data and research.

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Let's turn now to our team in Pyeongchang, South Korea. They have been spending time with a couple Olympic medalists in speedskating, both long and short track. Both of these formats can be pretty thrilling and also agonizing, as NPR's Melissa Block reports.

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