But when using branch lengths in the inference, a requirement of PhyloNet is that the trees also must be ultrametric, meaning that the tips of the phylogeny are all equally distant from the root.

Pay attention to the trees on your property throughout the year so you can keep them in good health. Large, mature trees provide the lion’s share of benefits to people, such as providing shade ...

WASHINGTON – President Donald Trump is expected to plant a young sapling from a historic White House Southern Magnolia tree on Tuesday. The sapling is 12 years old and was grown at the offsite ...

Lightning is often seen as a killer, leaving behind destruction and death of trees — but one tropical species has evolved to use the force of nature to its benefit. The tonka bean tree ...

The tree endured dramatic change and continued to anchor the space. The hustle and bustle of the neighborhood below was mirrored with wild activity in the canopy: a shifting cast of songbirds and ...

PORTLAND, Ore. — Local non-profit Friends of Trees celebrated a major milestone on Sunday, as the group planted its millionth tree. Community leaders and elected officials joined Friends of ...

A huge tree crashed down in Chester County, crushing an SUV and missing the driver by inches. The terrifying moment was caught on a gas station surveillance camera. You can watch that above.

In 2021, The New York Times referred to trees as “stationary superheroes” in the increasingly difficult fight against climate change. As catastrophic events like wildfires, flooding and heat ...

The authorities said a man used a chain saw to destroy more than a dozen trees in downtown Los Angeles, an attack that saddened and rattled residents and city leaders. By Jesus Jiménez Reporting ...

Getting hit by lightning is not usually a good thing. But one tropical tree species seems to harness heaven’s wrath. Not only do the trees survive lightning strikes, but their height and ...

Longmont and Boulder Valley Conservation District representatives wrapped up a tree sale by distributing tree seedlings at Red Wagon Farm, 1640 W. Baseline Road, in Lafayette on Friday and Saturday.