The Washington Post @washingtonpost
Billions of American chestnut trees once towered from Maine to Mississippi. But about a century ago, an exotic fungus nearly drove the tree out of existence. Today, researchers are growing American chestnut trees that can withstand that fungus. https://t.co/AdPsPzDZh0 https://t.co/YjTRKXbspx — PolitiTweet.org