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On Friday, the Rosetta spacecraft will smack into the icy surface of the comet 67P/Churyumov-Gerasimenko and go silent. Scientists with the historic mission are wondering how they'll feel as the orbiter makes its death-dive toward the comet that has been its traveling companion for more than two years.

Asked to name his favorite foreign leader, or any foreign leader he admires, Libertarian nominee for president Gary Johnson was unable to come up with an answer.

The exchange occurred on an MSNBC town hall hosted by Chris Matthews Wednesday night.

When Johnson hesitated at the initial question, Matthews said, "Go ahead, you gotta do this. Anywhere. Any continent. Canada, Mexico, Europe, over there, Asia, South America, Africa. Name a foreign leader that you respect."

It continued:

Researchers trying to understand diseases and find new ways to treat them are running into a serious problem in their labs: One of the most commonly used tools often produces spurious results. More than 100 influential scientists met in California this week and agreed on a strategy to address the troubling issue.

Cup Noodles, the dorm-room staple that cooks in three minutes, turns 45 this month. There's no better place to celebrate than its very own museum in Yokohama, Japan.

"This is the museum that really honors the creator of instant ramen and Cup Noodles," says museum manager Yuya Ichikawa, who leads me on a tour.

When the test scores came out, Lucas Siqueira, 27, was really excited. His high mark on the Foreign Service exam earned him a coveted position at Brazil's highly competitive Ministry of Foreign Affairs.

"They hire 30 diplomats a year and thousands of people sign up," he says in fluent English from his home in the capital Brasilia.

It was, he says, a great day.

Siqueira considers himself to be mixed race, known in Brazil as pardo, or brown.

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