MADISON – For more than a century, biologists have been working to assign plants, animals and microbes their respective places on the tree of life. More recently, by comparing DNA sequences from a few ...

What a cold week it has been! While I may not be the biggest fan of how cold it has been, a little bit of consistency has been nice. This winter has felt like such a back and forth. From freezing days ...

Low-cost “tree fitbits” can pinpoint the precise timing of tree activities, like spring bloom or autumn leaf change, according to a new CU Boulder study. Researchers outfitted two East Boulder ash ...

I recently participated in the Minnesota Shade Tree Short Course, which is a two-day professional development conference for tree care professionals sponsored by the University of Minnesota. More than ...

Scientists have discovered a completely new branch on the tree of life. This “supergroup” contains an incredibly diverse range of predatory microbes that are extremely different genetically from any ...

When arborists evaluate trees, whether it is a few trees on a home ground or many on a large commercial site, it is critical to note health condition. We commonly score the health factor with a range ...

When ash trees started to be removed in St. Paul, Mary Heskel began to wonder. The Macalester College biology professor knew, of course, that the trees — one of the most widely planted in the city — ...