Every month, our subscribers get to ask an expert anything. They’ve queried Dan Buettner on longevity, Lynsey Addario on photography, and Nima Rinji Sherpa about climbing. This month, they submitted questions for renowned herbalist Mimi Prunella Hernandez. Her answers (free to watch and part of this week’s Top 10 selection) on everything from herbal remedies to the nutritional values of cattails are fascinating! To submit questions for our next expert—happiness specialist Dacher Keltner—consider becoming a subscriber today.

—William O’Connor, Newsletter Editor 

Veronika, a cow living in an idyllic mountain village in the Austrian countryside, has spent years perfecting the art of scratching herself with sticks, rakes, and deck brushes. Now that scientists have discovered her, she has the distinction of the first cow known to use tools.

Today’s newsletter was edited and curated by William O'Connor and produced by Alisher Egamov. Let us know if you have suggestions and sign up here to get the Photo of the Week on Sundays.