Daily briefing: The town heated by one big battery

TL;DR - Nature’s daily briefing highlights a sand battery that can heat Pornainen, Finland, for up to a winter week, demonstrating large-scale thermal energy storage.

• The sand battery supplies community heating during cold conditions.
• Its stated storage duration is up to one week in winter.
• The briefing also flags funding risks for UK physics facilities and scrutiny of MAHA health claims.