Wearing a fitness tracking device could earn you cash from your health insurance company. At first, this sounds lucrative for the people who participate, and good for the companies, who want healthier insurance customers. But it’s not quite so simple.

Grief can seem desolate for those in the thick of it who often feel unable to imagine a way out of their suffering. But, as time passes, the pain usually dampens or becomes more fleeting.

Research suggests that around 70% of people will experience an illogical sense of being a phoney at work at some point in their careers. It’s called the impostor phenomenon (also known, erroneously, as a syndrome). These impostor feelings typically manifest as a fear of failure, fear of success, a sometimes obsessive need for perfection, and an inability to accept praise and achievement. The phenomenon is also characterised by a genuine belief that at some point you, as the “impostor”, are going to be found out for being a fake in your role.

Every surface we touch has its own unique chemical properties. It’s because of these properties that some materials stick to surfaces, while others slide off. For a person, a sticky surface may be a minor annoyance, but for a bacterial cell, surface attachment can be a matter of life and death. Bacteria have evolved their own surfaces to be sticky, like Velcro.