 Dr. Jeremy Werdel is an oceanographer in the Ocean Ecology Lab at NASA Goddard Space Flight Center and the project scientist for the PACE mission. Dr. Werdel, welcome to Living on Earth. Thank you so much. I'm really happy to be here. So how are you actually able to see and distinguish between different kinds of tiny particles? I mean, we're talking about like minuscule microscopic phytoplankton, aerosols that are also super tiny, and you're doing this from space.