In high enough concentrations, milkweed can kill a horse, or a human. To be able to eat this plant, monarchs evolved a set of unusual cellular mutations. New research shows the animals that prey on monarchs also evolved these same mutations.
Significant levels of antibiotic-resistant bacteria have been found at locations in and around Cambridge, England. The researchers found potentially dangerous Pseudomonas bacteria in over a fifth of samples collected close to the River Cam.