Here is the study on sleep & the common cold.
For more info on sleep, check out podcasts 135 and 109 and podcast 18 does a deep dive into sleep hygeine.

Mojo Mondays: Why You Need to Focus on Being Useful
13:32

Unlocking Human Potential: The Power of Play
1:05:40

Do you really need to watch your salt intake? The science is much more nuanced than Doctors think - Wisdom Wednesdays
11:39