Mark Rober talks to Guest Host Tiffany Haddish about her microscope, whether he was popular in school, the next biggest scientific break that is coming, space travel, what is going on in the bottom of the ocean, going to mars, his pranks on YouTube, Tiffany trying to build a glitterbomb, pulling pranks on Indian Call Centers, and partnering with Mr. Beast to raise $40 Million to provide clean water to two million people for decades. If you'd like to help, go to https://teamwater.org/! #TeamWater Watch 'Jimmy Kimmel Live!' WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.