As fall foliage peaks, scientists work to understand leaves' colors
November 9, 2025
11,278
969
34
8.89%
Search the Record
IndexedEvery word spoken in this episode is indexed. Type any phrase to jump straight to the moment it was said.
Type any word or phrase that may have been spoken. Click a result to seek the player to that exact moment.
Try a name, a topic, or a quoted line
Npr Episodes Around November 9, 2025
See what was published immediately before and after this episode.
0:58Now PlayingAs fall foliage peaks, scientists work to understand leaves' colors
YouTube Description
as posted by the channelThis is a busy time of year for scientists who are trying to understand autumn leaves. The most mysterious color is red.
In the fall, trees take apart their leaves' green chlorophyll to recover nitrogen, revealing yellow pigments that were there all along. But red pigments are different — trees make brand new red chemicals just days before a leaf is about to fall.
Why bother creating costly red pigments in leaves that are almost done for? Scientists still aren't sure.
Sentinel Indexing in Progress
Metadata and chapters are available. Claim extraction for this episode is pending.
All video content is delivered via YouTube embedded players in accordance with the YouTube Terms of Service. Sentinel provides research tools that promote discovery and accountability across political media.