A German scientist says a tree he discovered in Tanzania is Africa's tallest. It is a rare species, called Entandrophragma Excelsum, and stands 81.5m tall. Read more
Four of Britain's tallest trees in glen near Inverness
Conifers growing in the same Highland glen have been identified as being four of the tallest trees in Britain. Forestry Commission Scotland (FCS) said a Douglas fir in Reelig Glen, near Inverness, was now Britain's tallest tree at 66.4m. The fir is taller than Dughall Mor, a Douglas fir in the glen that had held the record as Britain's tallest. It is also the tallest conifer in Europe. Read more
A 200-year-old tree on a Wiltshire estate has been officially named as the tallest oak in the UK. The 40.4m English oak, in the grounds of the National Trust Stourhead estate, was measured by an expert on behalf of The Tree Register charity. Read more
Scientists have developed a mathematical model that predicts the maximum height trees can reach in particular environmental conditions. They hope their model will help ecologists get a better understanding of the relationship between trees and the surrounding ecosystem. Read more
A Douglas Fir in Argyll has been named the UK's tallest tree by a team of experts, who climbed to the top. At 63.79m (209ft) the Stronardon Douglas Fir near Dunans Castle beat the Grand Fir at Blair Castle in Perthshire to the title by more than a metre.
Scientists have launched a project aimed at solving the mystery of the giant redwood tree: What allows it to grow so tall and live so long? Arborists from Bartlett Tree Experts recently climbed almost 300 feet up three redwood trees in Roy's Redwoods Open Space Preserve in Marin County, Calif., to collect samples of new growth as part of an effort to clone some of the oldest and biggest redwood trees in the western USA. The project will take genetic material from the trees to create a "living library" so researchers can study what allows these trees to become the tallest and largest living things on Earth, says David Milarch of the Champion Tree Project, which is working with Bartlett and the Tree Research and Education Endowment Fund on the project.
Equipped with a laser range finder, a head for numbers and an explorer's zeal, Michael Taylor has made a sport of finding and sizing up the tallest species on the planet, California's ancient coast redwoods.
Researchers have found that a redwood named Hyperion in a remote Northern California forest is the world's tallest tree.
Steve Sillett, a forestry professor at Humboldt State University, recently climbed Hyperion and measured it at 379.1 feet, one foot taller than previously thought. Hyperion, which grows in Redwood National Park, edged aside the previous record holder, a 370.5-foot redwood called Stratosphere Giant in nearby Humboldt State Park. And at least two other trees in the Redwood National Park are taller; Next up is the 376.3 foot Helios, followed by the 371.2 foot Icarus.