01 / 8WIRED≈ approximate level B111:10–11:18 , , , , .
02 / 8Big Think≈ approximate level B25:22–5:25
, , .
03 / 8SoulPancake≈ approximate level A20:24–0:29
.
04 / 8CrashCourse≈ approximate level C14:19–4:26
, 's .
05 / 8Big Think≈ approximate level B111:06–11:15
, , .
06 / 8SoulPancake≈ approximate level B13:41–3:46
, ?
07 / 8Big Think≈ approximate level A29:48–9:54
's , 's , .
08 / 8BBC Ideas≈ approximate level B11:31–1:40
, .