South Africa, April 17 -- I feel that moment in my chest every time. Most people who build things know that feeling - the frustration of searching for something you believe exists, even when the evidence hasn't arrived yet. That feeling is the heart of Old Mutual Investment Group's new campaign, Champion the Unseen. And it resonates because it didn't start as a campaign at all.

The star nobody noticed

We filmed at the Johannesburg Observatory for strategic reasons. In 1915, its director Robert Innes discovered Proxima Centauri, the nearest star to Earth after the sun. It had been hiding in plain sight, so faint that nobody thought to search for it. The scientific community took years to accept the finding because the idea that something...