Scientists have confirmed the minimum age of the Sycamore Gap tree after it was illegally felled in 2023. The tree, which stood in a natural gap in the landscape next to Hadrian’s Wall in ...

Abstract: This paper proposes a method for generating and solving mazes using minimum spanning tree algorithms and parallelizing them using OpenMP. The approach involves generating a random maze using ...

Kirchhoff’s matrix-tree theorem asserts that the number of spanning trees in a finite graph can be computed from the determinant of any of its reduced Laplacian matrices. In many cases, even for ...

Section 1. Background. In Executive Order 14257 of April 2, 2025 (Regulating Imports With a Reciprocal Tariff to Rectify Trade Practices that Contribute to Large and Persistent Annual United States ...

Why some U.S. cities are so much greener than others. Ever since I first visited D.C., I was in awe of how full of trees it was. Rock Creek Park, one of the oldest city parks in the United States, is ...

The city of Bend’s code to protect trees from development is on the line as an affordable housing developer mounts a legal argument that the new regulations infringe on state law. The public has a two ...

A Southwest Portland couple and their two children are seeking $4.7 million in damages from the city of Portland’s Urban Forestry division and its forester Jenn Cairo after a tree crushed their home ...

Before a discovery in a Panamanian rainforest, “it seemed impossible that lightning could be a good thing for the trees,” a scientist said. By Rebecca Dzombak When lightning strikes a tree in the ...

Sophie Peel’s article, “The Taking Tree” [WW, March 5], missed a great opportunity to highlight the important role of a robust urban tree canopy in supporting community livability, public health and ...