Clare Lombardo

It's been a summer of heat waves in the Northern Hemisphere. But in Australia, a group of kangaroos is enjoying wintry conditions.

Stephen Grenfell captured their joy as the troop leaped across open fields, undeterred by the cold, wet ground just north of Goulburn, in New South Wales.

Updated 5:30 p.m.

Thousands of guns have been turned in to New Zealand police as part of a nationwide gun buyback program created after a massacre earlier this year left 51 people dead.

Following attacks on two Christchurch mosques, New Zealand's parliament voted overwhelmingly to ban most semi-automatic weapons along with certain kinds of ammunition and large-capacity magazines.

The first time that Simone Biles performed a triple-double at the U.S. Gymnastics Championships in Kansas City, she wasn't pleased. After soaring through the air to complete two flips and three full twists on Friday, she stumbled.

On Sunday, the 22-year-old did it again — and stuck the landing. It's the first time a woman has done so in competition.

The reigning world champion finished the competition on Sunday with the U.S. all-around title. It's her sixth.

Most days, 25-year-old Chavonne can push her student loan debt to the back of her mind.

Between short-term office jobs in the Washington, D.C., area, she drives for Uber. But once in awhile, a debt collector will get hold of her cellphone number — the one she keeps changing to avoid them — and it all comes back fresh. "I'll be like, 'Oh no!' " she says. "It's a sad reminder that I owe somebody money!"

In April, she got another reminder when the government seized her tax refund.

All this for a degree she never finished.

Americans owe about $1.6 trillion in student loan debt. That's about twice the current budget for the Defense Department and around 22 times the budget for the Education Department.