There are some 73,000 species of trees on Earth, according to one recent estimate. The writer Daniel Lewis zeroed in on a tiny fraction of them for his new book, "Twelve Trees." Each chapter is one ...

Challenging UNDATED (CNN) -- The first time Sam Van Aken saw tree branches being grafted and grown onto other trees, he likened it to Frankenstein. Yet, when the process became a full-time fascination ...

Fresh air, cooler temperatures, clean water – they’re just a few benefits trees offer the world. Despite their environmental importance, they’re not always respected, especially in urban areas where ...

The distinctive scent of fir trees is appealing to consumers and may also help repel pests and deer. UC Davis biologists are taking part in a new project to study how trees make these scents and to ...