Spaced repetition is a learning technique that uses increasing intervals between review sessions to improve long-term memory retention. This beginner guide explains how it works, its benefits, and answers common questions about implementing the method effectively.
Vannevar Bush's 1945 essay envisions future information technologies that could extend human knowledge and memory. He describes the "memex," a device for storing and linking information that foreshadows hypertext and personal computing. The article argues that scientists should turn from wartime destruction to developing tools to manage humanity's growing knowledge.
The forum discusses claims about GPT 5.4 solving a major open mathematics problem, with comments from mathematicians Terry Tao and Jared Lichtman. The thread appears to be speculative about AI capabilities in mathematical research.
Global energy markets face potential disaster due to supply disruptions, geopolitical tensions, and volatile price fluctuations. The situation threatens economic stability worldwide as key producers struggle to meet demand amid ongoing conflicts.
Global solar power capacity grew by 50% in 2025, marking the largest annual growth ever recorded for any energy source. This expansion was led by China, which installed more solar panels last year than the entire world did in 2023. The rapid growth demonstrates solar energy's increasing dominance in the global energy transition.
Global solar power capacity grew by 50% in 2025, marking the largest annual growth ever recorded for any power source. This unprecedented expansion highlights solar's rapid adoption worldwide as a major energy contributor.