Earth’s last major warm period was as hot as today
At peak of previous interglacial interval, sea levels were 6 to 9 meters higher
![sea level map](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/01/011917_TS_interglacial_main.jpg?fit=860%2C460&ssl=1)
HISTORIC HEAT Sea levels were 6 to 9 meters higher than present-day levels the last time Earth’s climate was this warm, new research suggests. Similar sea level rise today would submerge many coastal areas (red).
John C. Kostelnick (data), GSFC/NASA (visualization)