Water wars: How to avoid conflict over our most precious resource
31 July 2019
Climate change is altering weather patterns, endangering the water supply of over half of humanity. New thinking is required to avoid things boiling over
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Premium
Don't Miss: African origins, deadly mozzies and meeting of minds
31 July 2019
This week, listen to a founder of Out-of-Africa theory, read about our deadliest enemy, the mosquito, and explore the future of human and robot minds
This week’s new questions
31 July 2019
Why do biscuits go soft when left out, but cakes go hard? And why does liquid stay still when you spin it?
A key question: The secrets and security of a rotor-style lock
31 July 2019
How secure is a four-rotor lock? Continuing the discussion with an eye and lock-opening reader contribution
Special effects: What creates stripes and colours in the sky?
31 July 2019
A reader sent in a photo of a beautiful sky of striped clouds in pastel colours. Other readers respond with the cause of these effects
For the record – 3 August 2019
31 July 2019
We haven't actually seen intelligent glass yet
31 July 2019
Do we already know why cat owners are bolder?
31 July 2019
Please tell us the worst on methane emissions
31 July 2019
The metric system is not in fact a French plot
31 July 2019
