An all-female wasp is rapidly spreading across North America’s elms
The elm zigzag sawfly has spread to 15 states in five years. Now it's attacking the tree that cities planted to replace Dutch elm disease victims.
The elm zigzag sawfly has spread to 15 states in five years. Now it's attacking the tree that cities planted to replace Dutch elm disease victims.
We summarize the week's scientific breakthroughs every Thursday.
Amidst a tough year for science, glimmers of joy burst through in revelations from the silly to the sublime.