# When will the next ice age happen?

- Institution: TED
- Department: TED-Ed
- Speaker: Lorraine Lisiecki
- Year: 2018
- Level: For everyone
- Language: English
- Subjects: Biology, History, Teaching and learning
- Source: [TED](https://www.ted.com/talks/lorraine_lisiecki_when_will_the_next_ice_age_happen)
- 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: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Throughout Earth’s history, climate has varied greatly. For hundreds of millions of years, the planet had no polar ice caps. Without this ice, the sea level was 70 meters higher. At the other extreme, about 700 million years ago, Earth became almost entirely covered in ice, during an event known as “Snowball Earth.” What causes these swings in the planet’s climate? Lorraine Lisiecki investigates. \[Directed by Bálint Farkas Gelley, narrated by Pen-Pen Chen, music by James Wood\].

## Lectures

1. [When will the next ice age happen?](https://invisiblenetwork.ai/learn/ted/lorraine_lisiecki_when_will_the_next_ice_age_happen/e501e41b5e97), 5 min (TED's player)