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Problem

Problem across 32 linked articles from 2 sources, with context, storylines, and connected coverage.

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32

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2

Last update

Jun 29, 2026 at 19:00

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2

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2

Last 7 days

4

Ars Technica Hacker News

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Problem is being shaped by more than one post now: 2 fresh stories and 2 active sources in the last day.

Current topic phase: New pulse.
4 stories have landed around the topic over the last 7 days.
Ars Technica is currently driving the strongest coverage.
2 new sources joined this topic in the last day.
Company 90 articles Hidden from search

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Why it matters

Problem appears across 15 recent stories from 2 active sources, making this page a fast way to follow new developments, related topics, and the wider story graph.

Jun 29, 2026 at 19:00

Ozone loss was a thing even before CFCs were widely used

The ban on ozone-depleting substances that successfully reversed the growth of the hole in the ozone layer isn’t seen as a missed opportunity. On the contrar...

Jun 29, 2026 at 18:35

The 80% Problem: The Last 20% Is Where the Engineer Used to Live

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Jun 23, 2026 at 21:19

Trains halted across Germany because of communication system problem

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Jun 29, 2026 at 19:00 Ars Technica

Ozone loss was a thing even before CFCs were widely used

With today’s scientific tools, the problem could have been spotted in the 1950s.
Jun 29, 2026 at 18:35 Hacker News

The 80% Problem: The Last 20% Is Where the Engineer Used to Live

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Jun 23, 2026 at 21:19 Hacker News

Trains halted across Germany because of communication system problem

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Jun 22, 2026 at 22:54 Hacker News

AI's PR Problem

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Jun 19, 2026 at 11:59 Hacker News

Cocktail Optimization, an Integer Programming Problem

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Jun 16, 2026 at 22:23 Hacker News

Digital Printing of Arabic: explaining the problem (2017)

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