Over much of the past two million years, thick ice sheets blanketed the land and sea across vast swaths of the planet. Around 12,000 years ago, this frigid era began to lessen its icy grip. But the world is, to this day, recovering from the effects of the last glaciations. Relieved of its glacial burdens, the ground itself is gradually rebounding. Melting that began with the Ice Age’s wane is ongoing, making the oceans minutely fresher. And in the Atlantic Ocean, eelgrass is still trying to regain the genetic diversity it lost when ice isolated it from the Pacific.Throughout the northern...…Over much of the past two million years, thick ice sheets blanketed the land and sea across vast swaths of the planet. Around 12,000 years ago, this frigid era began to lessen its icy grip. But the world is, to this day, recovering from the effects of the last glaciations. Relieved of its glacial burdens, the ground itself is gradually rebounding. Melting that began with the Ice Age’s wane is ongoing, making the oceans minutely fresher. And in the Atlantic Ocean, eelgrass is still trying to regain the genetic diversity it lost when ice isolated it from the Pacific.Throughout the northern...WW…