
All about nature, the changing climate, biodiversity, and unstable weather patterns through the lens of human health.
| Platform | Pricing | Only free issues | Publishes | Weekly | |
|---|---|---|---|---|---|
| Issues | 294 | Founded | 2 years ago | Last Issue | 7 days ago |
| Active | |||||

Extreme heat strains the heart, brain, kidneys, and circulation and can quickly progress from discomfort to heat exhaustion, heat stroke, organ injury, or death.
Halfway through a six-day journey down Idaho’s Middle Fork of the Salmon River, my wife Tracy and I were hiking above Loon Creek when someone stopped. In a clear pool 40 feet below us, five enormous Chinook salmon held almost motionless in...
In today’s installment of Myth Diagnosis:
Myth: “Nutrition is simply about avoiding vitamin deficiencies.”
Truth: The discovery of vitamins transformed medicine and saved millions from diseases like pellagra, scurvy, and beriberi. But i...
According to new data out this week from the National Oceanic and Atmospheric Administration, this past July was the hottest month on record in the contiguous U.S.
As kids are going back to school and starting back in fall sports and activ...
Last week, I participated in the opening fireside chat at the Vanderbilt School of Engineering’s 20th Annual Healthcare Design + Construction Symposium. The event was held at Vanderbilt’s new Chelsea campus in Manhattan, which will welcome...
Subscribers, engagement, traffic and sponsorship for A Second Opinion.
| Subscribers | Engagement | 75 | Monthly Web Visits | ||
|---|---|---|---|---|---|
| Accepts Sponsors | Estimated Cost per Ad | ||||
How this newsletter ranks in the official Substack charts.
| #43 |
The writers behind this newsletter.
Chair of The Nature Conservancy, heart transplant surgeon, living in Franklin, TN with wife Tracy on a historic farm. And lots of animals. Former Majority Leader, US Senate.
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