In today’s Discovery: A massive cave labyrinth hidden under a rainforest, the phenomenon reshaping summer heat, and why the little Ice Age was so brutal.

But first: See the first images from Earth’s giant new telescope.

Perched high in the foothills of Chile’s Andes mountains, a revolutionary new space telescope named after astronomer Vera C. Rubin has just taken its first pictures of the cosmos—and they’re spectacular.

More stories:
— Earth’s newest telescope could discover Planet 9—and solve other huge mysteries
— Who was Vera Rubin? Here’s what to know about the GOAT of dark matter.

If you are the kind of explorer who enjoys crawling down into wet, hot darkness in order to find more wet, hot darkness, Borneo is a dreamland. For cavers, the thrill comes from finding new discoveries deep within some of the Earth’s largest, longest, and wildest caves.

Set after the events of “Black Panther: Wakanda Forever,” Marvel Television’s “Ironheart” pits technology against magic when Riri Williams (Dominique Thorne)—a young, genius inventor determined to make her mark on the world—returns to her hometown of Chicago. Her unique take on building iron suits is brilliant, but in pursuit of her ambitions, she finds herself wrapped up with the mysterious yet charming Parker Robbins aka “The Hood” (Anthony Ramos).

BEFORE YOU GO: Have you seen a roadrunner recently? Chances are your eyes aren’t deceiving you as sightings become more frequent across the U.S...

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.