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During a festival this week at the Bill & Melinda Gates Foundation, scientists from around the world showcased the latest toilet technologies. Bill Gates himself awarded top-performing commodes, including a solar-powered toilet and one that dehydrates waste within 24 hours.

There's a lot at stake in the fall election, including control of Congress and the White House. But important questions will also be decided at the state level. Ballot initiatives will let voters in several states decide on issues ranging from same-sex marriage to marijuana legalization.

Matt Bissonnette, the former Navy SEAL who wrote No Easy Day, reportedly plans to give part of his proceeds from the book to the Navy SEAL Foundation, a non-profit that aids Naval Special Warfare personnel and their families. But the group says it won't accept any money from the book's sales.

A federal court has rejected part of Florida's new election law that would have restricted the number of early voting days. The ruling, affecting five counties, is a win for groups who say the new law was meant to suppress voter participation in areas with large minority populations.

Some of the cost variations from a UnitedHealthcare database are startling. For treating a basic asthma episode, cases in the 10th percentile of distribution cost $98 each while those in the 90th percentile the cost was $1,535 per case.

In 1965, a majority of the world survived on less than 2,000 calories a day per person. Now, 61 percent of people worldwide have access to 2,500 or more calories each day.

The state follows Texas and several others who have seen their same-sex marriage prohibitions overturned in court. Michigan's attorney general has said he will appeal the decision.

Long before it fueled moviegoers, popcorn helped lay the foundation for the Aztec empire. In our video, we look at popcorn under a microscope, where the rock-hard kernel's fluffy secret is revealed.

Gamers are attracting millions of fans to their live competitions and bringing in some serious prize money. E-sports teams can be bought for millions, and players are traded for thousands.

Lydia Ko, the New Zealand golfer who last year became the youngest person ever to win an LPGA event, has played her way into the record books again. By successfully defending her title at the Canadian Women's Open this past weekend, Ko, who's now 16, is the only amateur to win two LPGA events.