NSA

This trending item is a blog post explaining a common misconception: the UV index measures the strength of ultraviolet radiation that causes sunburn and skin damage, not the warmth you feel from sunlight. That warm sensation comes mostly from infrared radiation, which is separate from UV. Readers on Hacker News appear to be sharing and discussing the post, apparently finding it a useful correction of a widespread misunderstanding about what the index actually tracks.

Classified budget estimates indicate the National Security Agency is paying billions of dollars to test artificial intelligence models. The figures, described in classified documents, suggest US intelligence is investing heavily in evaluating commercial and in-house AI systems for intelligence and security work. The scale of the spending has drawn attention online, with readers debating the implications for surveillance, oversight and the direction of government AI investment.

Lawyers aligned with India's Congress party clashed with police at the Sansad Marg police station in New Delhi during a protest connected to Gyanesh Kumar, the Chief Election Commissioner. Witnesses reported a female lawyer confronting officers during the confrontation. The incident has drawn widespread attention amid ongoing political tensions between the opposition and the Election Commission.

Arkansas officials have set October 5 as the voter registration deadline for residents who want to take part in the November elections. Voters who are not yet registered must submit their applications by that date to be eligible. The reminder is expected to prompt a last-minute push by election officials and civic groups encouraging Arkansans to check their registration status before the cutoff.

Chris Jones and French Hill, candidates in Arkansas' 2nd Congressional District, are attracting national attention as the race draws wider media coverage. The contest between Jones and incumbent Hill is being watched as a potentially competitive House race in a district that has not often been in the national spotlight.