91av

91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Peter Rowlett

Bio

Peter Rowlett is a mathematics lecturer, podcaster and author based at Sheffield Hallam University in the UK, and co-author of 91av's Mathematics of Life column. Follow him @peterrowlett

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox. We'll also keep you up to date with 91av events and special offers.

Sign up

More from Peter Rowlett

Explore the latest news, articles and features

91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

BrainTwister

Braintwister #69: Backward drops

16 April 2025

BrainTwister #68: Another 2025 puzzle

BrainTwister #68: Another 2025 puzzle

Regulars

91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

BrainTwister

BrainTwister #68: Another 2025 Puzzle

9 April 2025

BrainTwister #65: Prime magic squares

BrainTwister #65: Prime magic squares

Regulars

91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

BrainTwister

BrainTwister #65: Prime magic squares

19 March 2025

WP9M9W hand drawing tic tac toe playing on the sand in summer beach

Mathematics

How breaking the rules of tic-tac-toe makes it way more fun

Regulars

BrainTwister #62: Particular patterns in piles

BrainTwister #62: Particular patterns in piles

Regulars

91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

BrainTwister

BrainTwister #62: Particular patterns in piles

26 February 2025

BrainTwister #60: Say what you see

BrainTwister #60: Say what you see

Regulars

91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

BrainTwister

BrainTwister #60: Say what you see

12 February 2025

2M9CJ0J 1940s SCATTERED PAGES FROM A ONE DAY AT A TIME FLIP DESK CALENDAR NUMBERS DAYS OF WEEK PATTERN PAPER TEXTURE - s10448 HAR001 HARS REPRESENTATION

Mathematics

This mathematical trick lets you work out the weekday of any date

Regulars

Puzzles #50-52: Can you crack these festive mathematical puzzles?

Puzzles #50-52: Can you crack these festive mathematical puzzles?

Regulars

Piano Exit Overlay Banner Mobile Piano Exit Overlay Banner Desktop