The Boeing Co. unveiled what executives called a "proposed permanent solution to the 787 battery issue" Thursday night. The company’s 787 fleet has been grounded for two months because of safety concerns over the plane’s lithium-ion batteries. Two batteries in the fleet’s first 50 planes have had smoke and fire incidents.
In a statement, the FAA said Boeing could go ahead with its plan to test a redesigned battery system for the 787. The FAA also gave the green light to limited flights for two aircraft that will have test versions of the new systems.
Just as humans aren’t born knowing how to talk, birds aren’t born knowing what songs to sing. Take the song sparrow: Their songs are combinations of buzzing, trilling and music notes. Each song sends a message: “This is my territory,” or “Don’t mess with me.”
An aggressive sparrow mimics another bird's song, like a sort of playground argument. “Stop copying me.” “Stop copying me.” “Stop it!” “Stop it!” – until it comes to blows. Michael Beecher has been studying sparrow communication for nearly 30 years. Katy Sewall joins him in the field to start a sparrow fight.