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The trees in this grove, known as the Avenue of the Baobabs, are approximately 800 years old.

Sadly, these 20-25 baobabs are the only survivors of what was once a dense tropical forest.

But for the first time, scientists have observed physical changes in trees that correspond in some ways to sleep in humans and animals, or at least to our day-night rhythm.

Researchers from Austria, Finland and Hungary used laser scanners to scan two trees and scrutinize a cloud of millions of different points across their surface area.

From that, they learned that trees actually move overnight, a phenomena that scientists dating back to Charles Darwin have observed in smaller plants.“Our results show that the whole tree droops during night which can be seen as position change in leaves and branches", Eetu Puttonen, a researcher from the Finnish Geospatial Research Institute, explained in a press release.

The legendary Bowthorpe Oak, with its rugged bole, gnarled branches, and great spreading crown, stands in a grassy meadow behind a stone farmhouse in Bourne, Lincolnshire.

With a circumference of 40 feet, it competes for the title of largest-girthed living oak in Britain.

It is also perhaps the oldest living oak tree, with an estimated age of 1,200 years (give or take a century).NEWS: Oldest Rock Speck Zeros In On Earth's Cooling Date At Wakehurst Place, set among 170 acres of beautifully manicured gardens, is a gloomy cliff of Ardingly sandstone.A few hundred English winters have eroded the soil, but the yews of these woods have adapted to their surroundings.Tangled, black and menacing, they send their naked roots cascading over the huge greenish-blue rocks of the cliff’s edge, in search of soil to sink into.BLOG: New Plant Language Discovered Elegant in shape and form, these strange and magnificent baobabs seem to rise effortlessly to heights of 100 feet.They are found only on the island of Madagascar, where they are known as renala, Malagasy for ‘mother of the forest.’ These trees are a valuable source of food, fiber, dye, rope and fuel, among other things.