01 / 8WIRED≈ perkiraan levelB111:10–11:18 , , , , .
02 / 8Big Think≈ perkiraan levelB25:22–5:25
, , .
03 / 8SoulPancake≈ perkiraan levelA20:24–0:29
.
04 / 8CrashCourse≈ perkiraan levelC14:19–4:26
, 's .
05 / 8Big Think≈ perkiraan levelB111:06–11:15
, , .
06 / 8SoulPancake≈ perkiraan levelB13:41–3:46
, ?
07 / 8Big Think≈ perkiraan levelA29:48–9:54
's , 's , .
08 / 8BBC Ideas≈ perkiraan levelB11:31–1:40
, .