The problem of light pollution -- and 5 ridiculously easy ways to fix it | Kelsey Johnson
59:20
Trump, Europe, Ukraine and the Uncertain World Order | TED Explains the World with Ian Bremmer
18:43
De-Light the Night (Light Pollution Solutions) | Diane Turnshek | TEDxPittsburgh
18:56
What is economic value, and who creates it? | Mariana Mazzucato
17:11
Can AI Match the Human Brain? | Surya Ganguli | TED
12:52
Light Pollution: How Much Does It Affect Us?
9:36
‘Why in God’s name should Trump get a thank you?’: Fmr. Russia ambassador shreds Vance over Ukraine
19:27
As primeiras 20 horas - Como aprender qualquer coisa: Josh Kaufman no TEDxCSU
13:41