I sat on the tan, dusty ground of the quarry in north central Iowa, fingers grasping at the shell that lay halfway buried in the chalky clay and limestone. Wiggling it back and forth, I gently pulled it up from the ground that it had been resting in for millions of years. The ridged shell was almost perfectly intact, painting me a detailed picture of what the animal looked like. I had found a brachiopod fossil, a marine invertebrate who used to live in the warm, shallow sea of the Devonian Period, roughly 380 million years ago. As I sat examining my find, I couldn't help but think about how special it is to find something so ancient, to hold the remnants of their life in my hand, and glimpse what life on Earth was like millions of years ago.

In just the last week or two, new life has exploded in the Northwoods. To my brain, it feels like a burst of fireworks. Instead of embers sparkling in the darkness, there's been a surge of colorful blossoms, an eruption of vibrant baby leaves, a cacophony of birdsong, and a buzz of movement everywhere I look.

The shiny resin on balsam poplar buds turns to airborne molecules during spring leaf-out. Those molecules contain a myriad of chemicals that are useful to the tree -- and beneficial to us! Thriving in the far north -- farther than any other broadleaf tree in North America -- balsam poplar is poised to make drastic changes to the tundra as summer temperatures warm. Read more about this amazing tree in this week's Natural Connections, or listen to the podcast.