This week’s Top Ten examines ‘sleepmaxxing,’ discovers 2,200-year-old treasures from ancient China, dissects the obsession with 10,000 steps a day ... and sifts through new findings about cannabis. Plus, brain food is real.

PHOTOGRAPH BY VINCENT MIGEAT/AGENCE VU/REDUX 

PHOTOGRAPH BY PHOTOGRAPH BY REBECCA HALE, NATIONAL GEOGRAPHIC

Weed update: There have been several recent findings about what cannabis can do to your body. Do you know what is among them? 

A. It can affect your heart
B. ER cases are rising from a side effect of regular use
C. Its pain relief claims are debatable
D. All of the above  

PHOTOGRAPH BY STIAN KLO 

Magical: “Imagine the most pure and white snow you've ever seen, a dead silent forest, and these ice sculptures spread across the hillside.” In these surreal Arctic woods, photographer Stian Klo and a friend were greeted with a pastel sunset. Where were they? 

A. Alaska
B. Finland
C. Greenland
D. Siberia 

Did you know? The U.S. has tried to buy Greenland before. Here’s how those attempts went.  

Today’s Soundtrack: Chest Fever, The Band feat. Garth Hudson (R.I.P.)

Today’s newsletter was edited and curated by David Beard and produced by Amanda Williams-Bryant. Let us know if you have suggestions, and/or sign up here to get our upcoming Photo of the Week!