It's spring in Geneva when the secretary general of the cantonal parliament sees the first leaf on the city's official horse ...

Aquatic mayfly larvae performed better on American chestnut leaves than oaks and other trees in a preliminary test 1, so chestnut re-introduction may benefit stream ecosystems. Subsequent studies have ...

While many trees in the southern range were killed by Phytophthora root rot (PRR), the chestnut blight leaves roots intact, so many chestnuts have been surviving by growing back from the roots ...