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We did the math on AI’s energy footprint. Here’s the story you haven’t heard.
Understanding AI’s energy use was a huge global conversation in 2025 as hundreds of millions of people began using generative AI tools on a regular basis. Senior reporters James O’Donnell and Casey Crownhart dug into the numbers and published an unprecedented look at AI’s resource demand, down to the level of a single query, to help us know how much energy and water AI may require moving forward.
We’re learning more about what vitamin D does to our bodies
Vitamin D deficiency is widespread, particularly in the winter when there’s less sunlight to drive its production in our bodies. The “sunshine vitamin” is important for bone health, but as senior reporter Jessica Hamzelou reported, recent research is also uncovering surprising new insights into other ways it might influence our bodies, including our immune systems and heart health.
What is AI?
Senior editor Will Douglas Heaven’s expansive look at how to define AI was published in 2024, but it still managed to connect with many readers this year. He lays out why no one can agree on what AI is—and explains why that ambiguity matters, and how it can inform our own critical thinking about this technology.
Ethically sourced “spare” human bodies could revolutionize medicine
In this thought-provoking op-ed, a team of experts at Stanford University argue that creating living human bodies that can’t think, don’t have any awareness, and can’t feel pain could shake up medical research and drug development by providing essential biological materials for testing and transplantation. Recent advances in biotechnology now provide a potential pathway to such “bodyoids,” though plenty of technical challenges and ethical hurdles remain.
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