CORREIA Patrice/Alamy
Can all animals get drunk? If not, what enables this in those that can?
Chris Jack,
St Albans, Hertfordshire, UK
Arthur Dorety/Stocktrek Images/Getty Images
Earth was a hothouse 201 million years ago, leading to the Triassic-Jurassic mass extinction event. How did it recover? Why was there no runaway greenhouse effect?
Ralf Ludwig,
Melbourne Beach, Florida, US
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