Tag: sunlight
This powder can make water drinkable with sunlight
News Published on 03/23/2024 at 1:03 p.m. Updated 03/23/2024 at 1:03 p.m. Reading 2 min. Worldwide, 2.2 billion people do not have access to safe drinking water, according to a…
Cabinet of curiosities: the heliograph, a device that “records” sunlight without electricity
In this new chapter of Cabinet of curiositieswe forget the gray for a moment to set off to discover a strange instrument: the heliograph. Put on your sunglasses, make yourself…