Hannah Ritchie / Catherine Haymans
Two featured guests in the episode: an expert on global data for climate and energy (Hannah Ritchie) discussing China's solar capacity, and an astrophysicist (Catherine Heymans) describing the third interstellar object, both contributing topical 'numbers of the year' segments.
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Dec 27, 2025 • 9min
Numbers of the year 2025
Thomas Sampson, an economist from the London School of Economics, dives into the intricacies of US tariffs, highlighting their peak at 28% and the calculations behind them. Meanwhile, Hannah Ritchie reveals that China has surpassed one terawatt of solar capacity, rivaling India's electricity output. She discusses the rapid deployment of solar energy amidst challenges in meeting electricity demands. Astrophysicist Catherine Haymans introduces the intriguing 3I Atlas, the third interstellar object, revealing its age of over 7 billion years and its cosmic origins.
