About operant TED-EdTED Ed results of 3,156
36:51
29:59
49:30
50:09
47:28
50:35
60:03
28:51
29:58
32:05
30:01
33:26
43:09
105:25
23:23
46:15
25:45
25:29
205:22
79:51
30:31
28:28
29:02
30:24
31:04
23:22
41:56
31:23
27:07
32:36
29:59
31:13
29:01
25:41
25:46
26:17
47:07
56:17
30:00
92:53
66:53
31:43
60:54
34:47
31:12
56:11