The arrival of electric planes that can carry hundreds of people thousands of miles hinges on developing a new generation of batteries, motors and other technologies beyond what's powering today's electric cars.
Why it matters: Electric planes lead to cleaner flying, but plenty of R&D work remains before takeoff.
The songs of humpback, blue and other baleen whales are generated by the unusual anatomy of their larynx, according to a new paper.
Why it matters: A whale's song helps it find other animals in the vast ocean and plays a large role in their behavior, study co-author Coen Elemans, a professor at the University of Southern Denmark, told PopSci.
