Fifty years ago, ethylene research ripened
Excerpt from the June 12, 1965, issue of Science News Letter
![fruit ripening](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/05/lg_fruit_free.jpg?fit=860%2C460&ssl=1)
GETTING READY Ethylene, a gas, acts as a plant hormone. It tells fruits to ripen, roots to grow and seeds to germinate.
Vince Wingate/Flickr (CC BY-SA 2.0)