Walking efficiently takes next to no thought

Whether walking beside a lake or clambering a mountain, people adjust their strides to use the least energy possible. "People are continuously sensing their energy expenditure and adapting their gait to minimize costs," says ...

Nanotechnology: Smiles all round

A smile can say more than a thousand words, the saying goes. Orthodontics can help improve the appearance and position of people's teeth and jawbones, for better functioning teeth and more attractive smiles. In recent years, ...