Watch Episode #3 of Cosmos with Neil deGrasse Tyson: “When Knowledge Conquered Fear” (US Viewers)

Last week’s episode of the Cos­mos reboot saw Neil deGrasse Tyson giv­ing Fox view­ers a les­son in evo­lu­tion, a les­son that end­ed with the qui­et but emphat­ic dec­la­ra­tion: “The the­o­ry of evo­lu­tion, like the the­o­ry of grav­i­ty, is a sci­en­tif­ic fact. Evo­lu­tion real­ly hap­pened.” This week Tyson, the astro­physi­cist who directs the Hay­den Plan­e­tar­i­um, intro­duced view­ers to some sub­jects he holds near and dear: comets and grav­i­ty, the work of Edmond Hal­ley and Isaac New­ton, and how they changed our under­stand­ing of the world.

Relat­ed Con­tent:

Episode #1 of Neil deGrasse Tyson’s Cos­mos Reboot on Hulu (US View­ers)

Episode #2 of Neil deGrasse Tyson’s Cos­mos: Explains the Real­i­ty of Evo­lu­tion (US View­ers)

Neil deGrasse Tyson on the Stag­ger­ing Genius of Isaac New­ton

Neil deGrasse Tyson Talks Aster­oid Physics & “Non New­ton­ian Solids” with Inspir­ing 9‑Year-Old Stu­dent