When you walk through a rainforest, you might feel like you’re missing out. You can hear birdsong and insect noises from way up high. For decades, the rainforest canopy was called “the last biotic frontier,” due to the sheer difficulty of getting up there.
Just over 30 years ago, that began to change. Researchers from the Smithsonian installed an industrial crane in a Panama rainforest to give scientists access. Ten more were installed around the world over the next decade.
