Daily Briefing

[Daily Briefing] Galaxy with no dark matter 🌌, SharePoint under active attack 🛡️

6 July 2026

Today's big one

A galaxy that forgot to pack its dark matter

Dark matter is supposed to be everywhere. It's the invisible mass that keeps galaxies from spinning themselves to pieces, and by most counts it outweighs ordinary matter more than five to one. So astronomers confirming a galaxy that seems to have skipped it almost entirely is not a rounding error. It's the third one found, and it's the strangest yet.

Using the Keck Observatory in Hawaii, a team clocked how fast the galaxy's stars move. Fast-moving outer stars usually mean a big hidden dark matter halo tugging on them. Here the stars are ambling along slowly enough that the visible matter alone explains nearly all of it. There's barely any room left for the invisible stuff.

The twist: this one sits along a straight, chain-like line of galaxies, possibly the debris of a high-speed cosmic collision that stripped the gas and spun up new galaxies with no dark matter halo to inherit. Standard formation models really don't like that.

Why it matters: A galaxy that loses its dark matter while its neighbours keep theirs is actually decent evidence that dark matter is a real, separable substance, not just a sign our theory of gravity is a bit off. That's one of the biggest open arguments in physics, and this find pokes it hard.

Quick hits

Patch SharePoint now, this one's already being exploited. CISA added a SharePoint remote code execution flaw (CVE-2026-45659, 8.8 severity) to its must-patch list after confirming live attacks, and the federal deadline has already passed. If you run SharePoint, this is a today job, not a this-week job. Read more (3 minute read)

Google made a fitness tracker with no screen, on purpose. The new Fitbit Air is a 12-gram band, about the weight of two coins, that tracks steps, heart rate and sleep and lasts roughly a week per charge. No screen, no notifications, no nightly charging ritual. Weirdly appealing. Read more (3 minute read)

Decent 4K monitors are genuinely cheap now. 160Hz has quietly become the budget baseline, and the MSI MAG 275UPD (around the $249 mark) keeps getting called the standout: native 4K at 144Hz, or 288Hz in a 1080p dual mode. If your desk still runs 1080p, this is the year to fix that. Read more (5 minute read)

Nvidia's Rubin platform is quietly the bigger AI story. Everyone's watching the chatbots, but the claimed 10x cut in cost per AI token is what actually makes agentic models cheap enough to hand out for free. The models get the headlines; the chips decide what's possible. Read more (3 minute read)

The man who helped invent the chatbot is now at OpenAI. Noam Shazeer co-invented the Transformer, the architecture under basically every AI assistant you use, then left Google for OpenAI. When the person who wrote the blueprint switches sides, it's worth noticing where he lands. Read more (3 minute read)

Tool of the day

Claude Sonnet 5

Anthropic just made Sonnet 5 the default for every free and Pro account, and the interesting bit is that it's the most agentic Sonnet yet: it plans multi-step work, uses a browser and terminal, and checks its own output instead of waiting for you at every turn. This is genuinely good if you want an assistant that finishes a task rather than just answering a question. Skip it if all you ever do is quick one-line lookups, where you won't notice the difference.