In today’s Discovery: We could soon “zap” away unwanted memories. Plus, the journey of Canada’s last reindeer, and shedding new light on the “Dragon Man” skull.

But first: A new study ties marijuana to this worrying health risk. 

Despite its use as a wellness tool, cannabis comes with a growing list of potential health risks—and a recent study is adding one more to the list. Here are the risks we know so far and why the research is still playing catch up.

More discoveries:
— This strange syndrome is linked to regular cannabis use—and cases have doubled
— The ability to reverse damage to your lungs and heart is tantalizingly close

The practice of eating insects is a longstanding one, encompassing up to 2 billion people worldwide today. Despite being nutritious and environmentally friendly, edible insects have found limited mainstream acceptance—particularly in western societies. But thanks to sustainable insect farming, that could be changing.

BEFORE YOU GO: The high point of samurai history is often associated with the Edo period. But it actually marked the beginning of the end for the samurai.

Today’s newsletter was edited and curated by Jennifer Baik and produced by Alisher Egamov. Did someone forward this to you? Sign up for our other newsletters here.