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Politics

French teens keep up school blockades despite prime minister's pledge to act

French teenagers blockaded some high schools and marched through cities on Thursday after the government promised to address their grievances about teacher shortages and dilapidated school buildings. Reporting from Paris, France 24's Jamie Smith-Maillet says protesters he has spoken to see the government measures as lacking detail and have vowed to continue demonstrations until concrete action is taken.

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Science

Coffee doesn’t have to keep you awake to disrupt your sleep

Caffeine may make sleep less restorative even when you fall asleep normally and stay in bed for eight hours, with EEG recordings revealing fewer of the slow brain waves associated with deep sleep. Individual sensitivity varies dramatically, meaning even caffeine consumed earlier in the day could affect nighttime recovery for some people.

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Weather

Low-e windows keep homes cool … but may set neighbours’ property on fire

Low-emissivity windows also keep houses warm in winter, but use on bowed glass can have magnifying-glass effect Low-emissivity or low-E window glass is a useful green technology for keeping buildings warm in winter and cool in summer … but a rare side-effect can set the neighbours’ property on fire. The glass is coated with a thin layer of metal or metal oxide which lets visible light through but acts like a mirror in the infrared. Heat from the interior is reflected back in, retaining warmth in winter, while unwanted solar radiation is repelled in summer. Continue reading...

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