Dr Mike Gradisar is a leading international sleep researcher, clinical psychologist specializing in the treatment of sleep disorders, and the Head of Sleep Science at Sleep Cycle. Mike began studying the effects of technology and sleep since 2008, and is considered one of the leading scientific authorities in the field. His team led the first investigation testing blue light emissions from bright screens on sleep. Mike continues to spread the science of sleep via the Sleep Cycle app, the most downloaded sleep app in the world (60 million and counting). Mike lives between Australia and Sweden, with his two bedpartners (his wife Amy and his pug Rossi).