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April 16, 2014
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Researchers have discovered yet another benefit of exercise: It not only helps skin look younger, but may even reverse skin aging in those who begin exercising later in life.

According to The New York Times, scientists at McMaster University in Ontario, Canada, found that mice who were bred to age prematurely became frail and demented and lost their fur when they remained sedentary. Mice that had access to running wheels had an opposite response: They maintained healthy hearts, muscles, brains, and reproductive organs, and their fur never turned gray.

Researchers then turned to humans. They tested the skin samples of 29 volunteers — males and females, between the ages of 20 and 84 — and had half perform at least three hours of moderate or vigorous physical activity a week, while the others exercised for less than an hour each week. After taking samples of skin, researchers discovered that the men and women older than 40 who exercised frequently had a thinner and healthier stratum corneum (the part of the skin you see and feel) and thicker dermis layer, which looked more like that of a 20-something.

Scientists are still trying to figure out how exercise changes the skin composition, but they did discover that the skin samples of those who exercised more had high levels of a myokine — a substance created by active muscles that enters the bloodstream and starts changes in cells — called IL-15. While they still don't have all the answers, researchers are amazed by what they've discovered so far. "It is astonishing to consider all of the intricate ways in which exercise changes our bodies," says Dr. Mark Tarnopolsky, a professor of pediatrics and exercise science at McMaster who oversaw the study. Read more about the research at The New York Times. Catherine Garcia

5:19 p.m. ET
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Think of the URB-E ($1,500) as the hybrid of electric-powered personal people movers, according to BlessThisStuff.com. Sure, "it looks quirky," but if you don't mind turning heads, you might appreciate the bicycle-style seating position and scooterlike portability. It charges in four hours, has a range of 20 miles, and can reach 15 mph. Plus, because it folds down and weighs only 35 pounds, you can easily bring it with you on a train or bus — a capability that "greatly enlarges your radius of action." Made in the U.S. and available in multiple colors, it's a fun, portable, eco-friendly ride. "What more could you ask?" The Week Staff

4:51 p.m. ET
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Donald Trump may be the GOP's sole remaining candidate for the presidential nomination, but that doesn't mean top Republicans are full-throatedly embracing him. Former Florida Gov. Jeb Bush announced in a Facebook post Friday that he would not vote for Trump because he has not shown the "temperament or strength of character" required in a president. He also added that Trump is "not a consistent conservative" and "has not displayed a respect for the Constitution." Bush, once considered the frontrunner of the GOP primary race, clarified that he would not be casting a vote for Hillary Clinton, though he did say he would advocate for down-ballot Republicans.

Sen. Lindsey Graham (R-S.C.) also announced Friday that he could not "in good conscience" support Trump's bid for the White House. Graham, who dropped out of the presidential race in December, has been famously hard on Trump. Trump promptly issued a response to the senator: "While I will unify the party, Lindsey Graham has shown himself to be beyond rehabilitation. And like the voters who rejected him, so will I!"

Bush and Graham join House Speaker Paul Ryan as top-tier Republicans who have withheld their support from Trump. Bush's father and brother, both former presidents, have also declined to issue an endorsement of Trump — though Bush 43's former vice president, Dick Cheney, told CNN on Friday that he has always supported the GOP nominee and would do the same for Trump. Kimberly Alters

3:49 p.m. ET
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A Texas high school student is claiming that he's the victim of gender discrimination after being forced to cut his hair to comply with the school's dress code, The Daily Mail reports. Mickey Cohen spent two days in in-school suspension because his hair extended beyond the top of his T-shirt collar, a rule that doesn't apply to female students. "This is gender-biased," Cohen said. The Week Staff

3:25 p.m. ET
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Zac Blair is having a rough day. After missing a birdie in the Wells Fargo Championship on Friday, the 25-year-old golfer hit himself in the head with his putter out of frustration. Then he used the same putter to tap the putt in.

Only, when smacking the putter against his head, Blair slightly bent it — and thus used a "non-conforming club" that had been damaged "other than in the normal course of play" to knock the ball in, which disqualified him according to the PGA's rules.

Blair, at least, had a sense of humor about the whole thing, tweeting a GIF of Woody Austin doing a head bang in reply to the PGA's announcement of his disqualification:

Now has anyone asked how his head is doing? Jeva Lange

3:05 p.m. ET
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London is poised to welcome its first-ever Muslim mayor to office Friday. While the votes are still being counted from England's "Super Thursday" races, Labour Party candidate Sadiq Khan is currently projected to win the contest. Khan, the son of a Pakistani bus driver and seamstress, has 44 percent of the vote, while the Conservative Party's Zac Goldsmith has 35 percent.

Khan's win would offer a powerful voice to Britain's Pakistani community, as well as a larger challenge to the increasingly prevalent anti-Muslim rhetoric in the West. Final results are expected to be announced later Friday. Becca Stanek

2:38 p.m. ET
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On Thursday, Donald Trump said that as president, he might seek to reduce the national debt by convincing creditors to accept less than a full payment. "I would borrow, knowing that if the economy crashed, you could make a deal," Trump said, in comments that the The New York Times claimed "have no modern precedent" coming from the mouth of a major presidential candidate. "If the economy was good, it was good. So, therefore, you can't lose," Trump continued.

Experts have dismissed the idea that creditors would accept anything less than 100 cents on the dollar, no matter how good a businessman Trump might be. In fact, it might be because he's a businessman that Trump thinks the scheme could actually work:

Repurchasing debt is a fairly common tactic in the corporate world, but it only works if the debt is trading at a discount. If creditors think they are going to get 80 cents for every dollar they are owed, they may be overjoyed to get 90 cents. Mr. Trump's companies had sometimes been able to retire debt at a discount because creditors feared they might default.

But Mr. Trump's statement might show the limits of translating his business acumen into the world of government finance. The United States simply cannot pursue a similar strategy. The government runs an annual deficit, so it must borrow to retire existing debt. Any measures that would reduce the value of the existing debt, making it cheaper to repurchase, would increase the cost of issuing new debt. Such a threat also could undermine the stability of global financial markets. [The New York Times]

What's more, history shows that spooking investors away from taking a chance on relatively safe Treasury securities ends up costing taxpayers an arm and a leg. Read more about Trump's unprecedented plan — and what economists have said against it — in The New York Times. Jeva Lange

2:36 p.m. ET
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Sen. Bernie Sanders (I-Vt.) penned a letter to Democratic National Committee Chairwoman Debbie Wasserman Schultz on Friday, accusing her of tipping the convention in Hillary Clinton's favor. Sanders says that out of the 45 names he submitted to serve on Democratic National Convention committees, Wasserman Schultz only appointed three, and filled the committees mostly with Clinton supporters:

I believe the composition of the standing committees must reflect the relative support that has been received by both campaigns. That was why I was so disappointed to learn that of the over 40 people our campaign submitted at your request, you chose to select only three of my recommendations for the three standing committees. Moreover, you did not assign even one of the people submitted by our campaign to the very important Rules Committee of the Democratic National Convention. [Bernie Sanders]

Sanders also wrote that if the issue was not resolved, he would have his delegates move to change the party platform and the convention rules. The DNC quickly responded, assuring Sanders that both candidates would be fairly represented at the July convention. "Because the party’s platform is a statement of our values, the DNC is committed to an open, inclusive, and representative process," the DNC said in a statement. "Both of our campaigns will be represented on the Drafting Committee, and just as we did in 2008 and 2012, the public will have opportunities to participate." Becca Stanek

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