6 November 2019
These futuristic solar panels in Chile’s Atacama desert are part of ambitious plans to go carbon neutral, as unrest forces the country to abandon hosting a UN climate conference
6 November 2019
Making mistakes helps us learn and get better at stuff, says neuroscientist Henning Beck, but be wary of thinking what works for humans will work for AI
6 November 2019
What determines the temperature of a flame, and is it more secure to change a PIN number or keep the bank’s original?
6 November 2019
If a spring is compressed and placed in a bath of acid and then dissolves, where does the potential energy go? Readers explain
6 November 2019
Why do some people seem to turn naturally to studying science but others aren’t interested at all? The first answers are in
6 November 2019
Secrets of quantum speed reading, cow dung handwash and snacks made from real ingredients in Feedback’s regular round-up of the ridiculous
6 November 2019
A piece of wood cut into squares: how many blocks can you cut out of it? Plus, answer to puzzle #28 and the quick quiz
6 November 2019
Try your hand at this week’s cryptic crossword, set by Wingding. Plus, answers to quick crossword #44
6 November 2019
On 11 November, the innermost planet of the solar system will make a rare crossing of the face of the sun. Here's how to see it without expensive kit
