𝗔 𝗖𝗔𝗣𝗦𝗧𝗢𝗡𝗘 𝗢𝗡 𝗢𝗨𝗥 𝗛𝗘𝗔𝗧 𝗦𝗘𝗥𝗜𝗘𝗦 𝗣𝗮𝗿𝘁 𝟱: 𝗔 𝟭𝟬,𝟬𝟬𝟬-𝗬𝗲𝗮𝗿 𝗪𝗶𝗻𝗱𝗼𝘄 𝗜𝘀 𝗖𝗹𝗼𝘀𝗶𝗻𝗴

SHOW NOTES The Earth has been far hotter than this before. Fifty million years ago there were crocodiles in the Arctic, and for most of this planet's history there was no ice at the poles at all. So why does this time matter? That question deserves a real answer, and this episode is where the Heat series steps back and gives one. The answer isn't the heat. It's the speed. The fossil record has run this experiment twice — one hot world that arrived gradually and filled with life, and one coole...