We like to think that science is completely objective and scientists are absolutely certain of their theories. But ask any scientist how they reach their conclusions and you’ll be surprised to see them talk about doubt rather than certainty, about what might or could be rather than what is true.

Ed Caesar, journalist and author of Two Hours: The Quest to Run the Impossible Marathon gives his top tips for getting faster, whatever kind of runner you are.

From an early age, we humans seek answers; we seek a theoretical understanding of our environment; we ask the question “Why?” In this extract, from new book The Upright Thinkers theoretical physicist Leonard Mlodinow explains why this is the the question that every child needs answering.

Jetpacks and mind machines! Think Smarter looks into the future! This week’s reading list is designed to equip you for all the technological and ecological advances of the next few years.

The Penguin art department collaborated with renowned photographer Dan Tobin Smith to create a unique cover design for Mark Miodownik’s equally unique book Stuff Matters. Here Penguin designer Richard Bravery talks us through the process.

As we get closer to Valentine’s Day, esteemed neurobiologist Dick Swaab takes a look at love on physiological perspective: what happens to our brains when we fall in love? Find out in this exclusive extract from his fascinating new book We Are Our Brains.