Scientists have teamed up with a games developer to build a Facebook puzzle to help identify genes that are resistant to ash dieback - a disease that is ravaging Britain's ash tree population.
Researchers have found that certain trees seem to be naturally immune from the disease, and are hoping to use these natural survivors to grow resistant forests in the future.
The puzzle, which resembles the popular video game Bejeweled, involves players matching rows of coloured leaves.
Dr Dan MacLean, who came up with the idea, says the leaves represent genetic information and that humans are far better than computers at spotting patterns.
The developers describe the game, called Fraxinus, as "a game of competitive pattern sequencing with a real world twist".