Imaging wall-less plant cells every six minutes for 24 hours revealed how the cells build their protective barriers.

President Trump appeared to double down on his threats to seize the Panama Canal, as Secretary of State Marco Rubio arrived in Panama Sunday with an ultimatum from the White House. Photo: Ben ...

17xM, a 334,000-square-foot, 11-story building at 1150 M Street, N.W., includes a two-story, 1,500-square-foot, self-watering green wall of living plants. 17xM includes a two-story, 1,500-square ...