# Earth's mysterious red glow, explained

- Institution: TED
- Department: TED-Ed
- Speaker: Zoe Pierrat
- Year: 2021
- Level: For everyone
- Language: English
- Subjects: Teaching and learning
- Source: [TED](https://www.ted.com/talks/zoe_pierrat_earth_s_mysterious_red_glow_explained)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

In 2009, a satellite circled Earth, scanning and sorting the wavelengths reflecting off the planet's surface. Researchers noticed something baffling: an unexpected wavelength of unknown origin. They tried looking at Earth with only this wavelength, and saw the planet covered in a red hue of varying intensity. So, what was going on? Zoe Pierrat explores the science of chlorophyll fluorescence. \[Directed by Denis Chapon, The Animation Workshop, narrated by Bethany Cutmore-Scott, music by André Aires\].

## Lectures

1. [Earth's mysterious red glow, explained](https://invisiblenetwork.ai/learn/ted/zoe_pierrat_earth_s_mysterious_red_glow_explained/44deb8bc5a16), 5 min (TED's player)