Roughly 14% of Europeans suffer from anxiety, and while diazepam works for some, herbal remedy-loving Germans are turning to the power of flowers. Lasea contains lavender oil, is safe to take while driving, and leaves your breath fragrantly fresh. But why do Germans put their trust in nature?

The Western world is in the grip of an anxiety epidemic, yet while rates of mental illness have surged, health services have struggled to keep up. Could effective care be delivered by an app? That’s the goal of Joyable, which offers CBT treatments to social anxiety sufferers through their smartphones.

One in ten Americans are clinically depressed. As busyness becomes a status symbol for Millennials, the stress is mounting. 'Text therapy' platform Talkspace appeals to a generation accustomed to immediate answers with a tap of a smartphone – but is it effective?

If Faisal Islam, Ralph Keyes and the New York Times are to be believed, the Trump candidacy and the vote for Brexit show we've entered a post-truth era – a world where emotion and populism win out over facts and experts. But is it true? And do emotional appeals really trump facts and figures?