Learn and revise how to solve quadratic equations by factorising, completing the square and using the quadratic formula with Bitesize GCSE Maths Edexcel.

Today, the military intelligence professional must be proficient across traditional and emerging disciplines, missions, and functions. NMIA is the only joint military intelligence professional ...

Proteins are the workhorses of cells. Learn how their functions are based on their three-dimensional structures, which emerge from a complex folding process.

To be published by The Conversation you must be currently employed as a researcher or academic with a university or research institution. PhD candidates under supervision by an academic can write ...

Jill Lepore, a staff writer, has been contributing to The New Yorker since 2005. Her books include “We the People: A History of the U.S. Constitution”; “The Name of War,” which won a ...

Submit a letter to the editor The Post welcomes letters up to 250 words on topics of general interest. Letters must include full name, home address, day and evening phone numbers, and may be edited… ...

Editorial Guidelines 2025 The Editorial Guidelines set the BBC's editorial values and standards. The guidelines apply to all BBC content wherever in the world it is broadcast or published.

Our pioneering podcast subscription: two contributors explore an area of literature through a selection of key works, providing an introductory grounding like no other. Listen to extracts from each ...

We compare ChatGPT's Pro, Plus, and Free plans: Which tier is right for you?