“Sensory hairs are versatile structures. They can be actively pressed against surfaces to produce tactile sensations, as whisking rats and oripulating manatees do. But they can also be passively bent and deflected by flowing air or water. By responding to that pressure, an animal can detect the flows created by distant objects, touching things from afar without needing to make direct contact.” -Ed Yong, An Immense World, page 172
Sometimes I play a game with myself: I look up at the sky and imagine a vaulted veiling, sometimes above the treetops, above the bird’s flight paths, above the clouds. I’m trying to take a sip of just how much open space I’m seeing. Something similar has happened when I stood high on a mountain ridge, looking across a valley to another peak: all that expanse, as far as a long day’s hike, as close (it seems) as cold lakewater cupped in my two hands. It can be hard for me to see how much this how much is, how deep, how wondrous. And so I practice.
And I practice with what I can’t see. Yong goes on to describe an experiment in which two manatees could clearly feel the slight vibrations—movements of less than a millionth of a meter—of a submerged sphere a meter away from their flanks. What would that be like, to be so in touch with the flow of the water you swim in? I don’t know. I imagine it. Just as delightedly, I remember that I don’t know. I imagine how little I see: how narrow a face of the world my eyes give me (wondrous as they are). I look at my skin, my arm hairs, sensitive in so many ways. I feel how much I have to learn from a manatee about being touched.