Subscribe now
HDTNNH Crab-eating macaca in Thailand ; specie Macaca fascicularis family of Cercopithecidae

This week’s new questions

12 July 2023

Can all animals get drunk? And why was there no runaway greenhouse effect 201 million years ago, when Earth was a hothouse?
This mosaic of Mars is a compilation of images captured by the Viking Orbiter 1. The center of the scene shows the entire Valles Marineris canyon system, more than 2,000 miles (3,000 kilometers) long, 370 miles (600 kilometers) wide and 5 miles (8 kilometers) deep, extending from Noctis Labyrinthus, the arcuate system of graben to the west, to the chaotic terrain to the east.

If humans colonised Mars, how would they calculate time? (Part 2)

12 July 2023

Our readers point out that history shows it is best to stick to one measure of time to avoid confusion – but add that it may not be humans who get to decide how time is calculated on Mars
HCNBCF THOR: THE DARK WORLD, Chris Hemsworth as Thor, 2013. ph: Jay Maidment/?Walt Disney Studios/courtesy Everett Collection

Could you make a machine that “flew” like Thor’s hammer in the comics?

12 July 2023

Such machines already exist, in a sense, say our readers - but an immortal being might also be using effects science has yet to understand
New Scientist Default Image

Puzzle #230: Try to fathom the tourist-on-the-train photo problem

12 July 2023

Can you solve this week’s arithmetical puzzle, Train of thought? Plus the answer to puzzle #229
The stunningly simple rule that will always get you out of a maze

The stunningly simple rule that will always get you out of a maze

12 July 2023

You thought the maze looked fun, but now you can’t find your way out. Luckily, mathematics is here to help you escape, says Katie Steckles

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox. We'll also keep you up to date with New Scientist events and special offers.

Sign up
Piano Exit Overlay Banner Mobile Piano Exit Overlay Banner Desktop