Global temperatures are approaching levels modern humans may not have experienced

Global mean surface temperature estimate, C

33.3m years ago

23.7C

Era of modern humans

25C

2023

15.08C

20

15

10

5

30m years ago

20

10

0

33.3m years ago

23.7C

Era of modern humans

25C

2023

15.08C

20

15

10

5

30m years ago

20

10

0

33.3m years ago

23.7C

Era of modern humans

25C

2023

15.08C

20

15

10

5

30m years ago

20

10

0

33.3m years ago

23.7C

Era of modern humans

25C

2023

15.08C

20

15

10

5

30m years ago

20

10

0

33.3m years ago

23.7C

Era of modern humans

25C

2023

15.08C

20

15

10

5

30m years ago

20

10

0

Guardian graphic. Source: IPCC Sixth Assessment Report, Hansen et al, 2013, Noaa. Note: era of modern humans shown as starting 300,000 years ago