Temperature records from thermometers and weather stations exist only for a tiny portion of our planet's 4.54-billion-year-long life. By studying indirect clues—the chemical and structural signatures of rocks, fossils, and crystals, ocean sediments, fossilized reefs, tree rings, and ice cores—however, scientists can infer past temperatures.

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June 2024 was the hottest June on record, the European Union's climate change monitoring service said on July 8, continuing a streak of exceptional temperatures that some scientists said puts 2024 on track to be the world's hottest recorded year.

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We don't exactly have records from millions or billions of years ago, so I don't know why you think this article is lying to you.