The program is supported by the vast majority of Americans, but, unless changes are made, it will start running out of money to pay full benefits in 2033.

Over the past three decades, the share of homeowners ages 65 to 79 with a mortgage rose from 24% to 41%.

And their amount of debt is also on the rise. That’s pushing more households into the ranks of the financially precarious.

A new study finds that “a large fraction — around 20% — of college graduates obtained their degree after age 30.”

Growing numbers of entrepreneurs and their financial backers are starting to see aging as an opportunity for innovation and profit.