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Brett Westwood explores our relationship with the baobab or upside-down tree.

Hinduism's sacred tree Thimmamma Marrimanu is believed to aid childless couples

Could trees be even better at tackling air pollution than previously thought?

Climate change and security concerns are threatening one of Buddhism's most sacred sites

This week we hack the secret plant communication network “The Wood Wide Web”.

What is the oldest tree or other living organism on Earth?

Underwater geology reveals how 450,000 years ago Britain tore away from Europe

Trees take in carbon dioxide but they also convert some of the toxic gases in our air.

How do we protect our native wildlife from invisible invaders like the ash-dieback fungus.

Birch trees provide punishment, beauty, versatility and wine, but are very short-lived.

Fiona Stafford on the holly tree, which reaches huge proportions if not pruned annually.

Fiona Stafford discusses the cherry tree, prized in many ways, but also in sharp decline.

Fiona Stafford discusses the Leyland cypress or leylandii.

Professor Fiona Stafford discusses the horse chestnut tree.

Fiona Stafford on the poplar, the most modern tree and the first to have its DNA sequenced

Fiona Stafford discusses the apple tree, which has been loved and hated for centuries.

Professor Fiona Stafford on hawthorn trees, which have divided Britain for centuries.

Professor Fiona Stafford on the workhorse of the forest, the pine tree.

Professional tree climber James Aldred visits Morocco to climb a giant Atlas cedar tree.

Why are our feelings about trees so mixed? Mike Williams explains

Chris Sperring is in Hampshire looking at lime trees with lime tree specialist Hugh Milner