Five people moved in tandem down a trail, connected by a wheelchair unlike any other.

This hiking trail, popular with Bend, Ore., families, is a testing ground for inventor Geoff Babb. One miscalculation about how to navigate a tight squeeze of boulders, and he could topple over the edge toward an ice-cold river below. But that's not what worried Babb, who hasn't walked since a stroke 14 years ago.

"I don't feel scared on the trail. I trust these guys to figure it out," Babb said, adding that he feels more vulnerable crossing a city street.

On "good" bad days, the shells lay open at the bottom of the river, shimmering in the refracted sunlight. Their insides, pearl white and picked clean of flesh, flicker against the dark riverbed like a beacon, alerting the world above to a problem below.

Updated at 9:58 a.m. ET

The tariff war has caused a lot of anxiety for business owners and farmers. But how much has it hurt the overall economy?

The stock market got off to a rocky start this week when President Trump launched a new round of tariff threats. But administration loyalists insist concern about the trade war is overblown.

A new Gilded Age has emerged in America — a 21st century version.

The wealth of the top 1% of Americans has grown dramatically in the past four decades, squeezing both the middle class and the poor. This is in sharp contrast to Europe and Asia, where the wealth of the 1% has grown at a more constrained pace.

One of opera's leading men, Italian tenor Vittorio Grigolo, was dismissed Thursday by two of the world's most prestigious houses: the Royal Opera in London and New York's Metropolitan Opera.

His firing comes after an investigation by the Royal Opera [RO], which determined that he had demonstrated "inappropriate and aggressive behavior" during an RO tour of Japan in September.

Scientists know that if they transfuse blood from a young mouse to an old one, then they can stave off or even reverse some signs of aging. But they don't know what in the blood is responsible for this remarkable effect.

Researchers now report that they've identified hundreds of proteins in human blood that wax and wane in surprising ways as we age. The findings could provide important clues about which substances in the blood can slow aging.