Physicist Jim Al-Khalili on Leeds United, Einstein and quantum biology
31 July 2019
Quantum physicist and broadcaster Jim Al-Khalili talks footballing ambitions, dream chats with Einstein and the incredible connection between gravity and space-time
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Premium
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
Should we be scared of meth gators and mutant crocodiles?
31 July 2019
The war on meth gators and super-crocs continues, plus poisoned pools, flying flamethrowers and Grimes at the gym in our weekly round-up from the world of weird
New Scientist puzzle #15: Lines through the chessboard
31 July 2019
Can you draw lines that cut through every square of a chessboard? Plus the quick quiz and solution to puzzle #14, the H coins problem
Quick crossword #37, and last week’s answers
31 July 2019
Try your hand at Richard Smyth’s science-themed crossword. Plus, answers to cryptic crossword #11
How to build a motion-detector wildlife camera with an old smartphone
31 July 2019
Make a motion-controlled wildlife camera with an old smartphone and find out what birds, bees, butterflies and badgers are visiting your garden
Liana Finck cartoon
31 July 2019
This week's cartoon - 3 August 2019
Huge Arctic fires have now emitted a record-breaking amount of CO2
25 July 2019
Wildfires still burning in the Arctic have continued for so long they have now released more carbon dioxide than any other year since records began
