Pluto isn’t a planet for the same reason whales aren’t fish
History plays a role in demarcating natural categories, from biological species to mineral kinds to planetary classification.
Essays
Underground highways of Arctic fungi challenge how we think about conservation
I joined researchers on an expedition to find some of Alaska's rarest (and most elusive) fungi.
The Moral Case Against Artificial Constellations
Three potential satellite projects may change our night sky forever. Beyond the environmental and scientific problems, the proposals are an ethical nightmare.
Watercolor brings new truths out of my climate research
A climate scientist on why she uses paint to share her research on lakes.
What we learn in the footsteps of wolves
Up close and personal with nature's notoriously elusive carnivore.
During labor, mothers shouldn’t have to take their discomfort lying down
Upright birthing positions can be safer for mother and baby than birthing on the back.
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