The metre-long Microraptor, one of the smallest dinosaurs in the fossil record, had feathers on its arms, legs and tail. Its odd-looking five-wing gliding setup provides clues to the earliest evolution of flight, according to a new study in Nature Communications.
The Oregonian, Randy C. Rasmussen
When the Sellwood Bridge in Portland, Oregon, was built in 1925, it wasn't designed to carry 30,000 vehicles a day. Or to hold back a slow landslide. But by the 1980s, cracks were forming in the bridge's supports, leading inspectors to rate the bridge a 2 on a 100-point federal safety scale and to eventually ban heavy trucks, buses, and fire engines. So county engineers decided it was time for a new bridge, and the least expensive option ($306 million) was to move the existing structure over to serve as a detour while a new one was built in its place. But the bridge's rare design-a one-piece, 1,100-foot, 3,400-ton truss-posed an unusual problem. How do you move a whole bridge at once?
The collapsed I-5 span over Washington's Skagit River
It's been a rough week for bridges around the U.S. At about 7 p.m. local time in Washington state yesterday a bridge spanning the Skagit river north of Seattle (part of Interstate 5) collapsed after a truck carrying a tall load collided with one of the spans, sending two cars plunging into the river below. The three people in those cars all survived with non-life-threatening injuries, but it should probably come as a surprise to no one that the bridge - which services about 71,000 crossings of the Skagit river every day - is rated "functionally obsolete" by the Federal Highway administration.
AP Photo/Herald Star/Michael D. McElwain
Monday mornings pretty much always make me feel like blowing things up. So watching videos about things blowing up - or people blowing things up - seems to be a perfect way to ease into the work week.