Insects invented song. They’ve developed a multitude of ways to listen. But insects couldn’t have evolved these complex skills without... more

Sometimes we have to be loud when we want to be quiet. Threshold is nonprofit, listener-supported, and independently produced. You can... more

What is sound? And what does it mean to listen? In this episode, we take a closer look at sound:... more

Coral reefs are some of our planet’s most beautiful and biodiverse habitats. They’re also rich with sound, a bustling marine... more

The planet is filled with unexpected and magical sounds… all you have to do is listen.Threshold is nonprofit, listener-supported, and... more

Beneath the water lies a whole world of sound: snorts, boops, croaks, grunts. Fish, it turns out, have a lot... more

For most of our planet’s existence, the Earth was quiet. The boisterous sounds of life we know today are a... more

Humans are born into a wondrous planetary chorus. But today, many of us rarely hear anything other than ourselves. In... more

In June 2024, the planet hit a terrifying milestone: 12 straight months of global temperatures at or above 1.5 degrees... more

In Season 1 of Threshold, we reported on the decades-long fight to get the federal government to transfer the National... more