PBS Presents

Think Wednesday | Feb. 27, 2019 Preview

Preview | 30s Video has closed captioning.

Join NATURE and explore Yosemite with experts to discover how climate change affects the valley’s majestic beauty. On NOVA, follow our ancestors’ footsteps out of Africa along a trail of fresh scientific clues to help unravel the mystery of how we got where we are.

Aired: 02/27/19

Rating: NR

Problems Playing Video? | Closed Captioning