The biggest surprise from the new horizons flyby of pluto was learning that pluto

The biggest surprise from the New Horizon’s flyby of Pluto on July 2015 was learning that Pluto has frozen Methane that resembles a row of knives with the edges pointing up located around its equator. It is similar to Earth’s “penitente”, snow formations found at high altitudes, but the formations on Pluto can measure hundreds of feet tall.

silk

indigo  

rice

all the other answers are wrong

a system of cooperative federalism emerged, as the powers of the federal government expanded.