This admiration for the trees did not diminish, and in 1856, famed naturalist and writer Henry David Thoreau even delivered a eulogy for an American elm cut down in his hometown of Concord ...

The fact that apples grown from seedling trees are extremely tart and basically inedible — as opposed to cloned or grafted ...

Walden’s ice breaks up and many plants bloom at least two weeks earlier than in Thoreau’s day, while leaves emerge on trees 18 days earlier. Only the migrating birds return at roughly the same ...