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Chemistry Tier 2 · Expert

Why Is Water Densest at 4°C? A Deep Dive Into the Anomaly

Deep dive: This is the expert companion to our plain-language guide. For the short version — water’s strange chemistry in everyday terms — see: Why Is Water So Weird? The Chemistry That…

1,813 words 9 min read November 7, 2026
Artificial Intelligence Tier 1 · Public

How to Make GIFs in ChatGPT With Images 2.6

On 4 November 2026, OpenAI gave ChatGPT a new trick: the ability to turn a sentence or a photograph into a short animated GIF. The feature arrives with Images 2.6, the latest…

1,542 words 8 min read November 5, 2026
Travel Tier 1 · Public

How Do Planes Navigate Across Empty Oceans?

In June 1919, two British airmen climbed into a converted First World War bomber in Newfoundland and pointed it at Ireland. Captain John Alcock flew. Lieutenant Arthur Whitten Brown navigated, using a…

1,702 words 9 min read November 3, 2026