Two invasive species — the brown tree snake and the American bullfrog — cost the world more than $16 billion between 1986 and 2020, according to a study.  Researchers say the already-hefty price tag should be seen as a lower limit on the true cost of invasive reptiles and amphibians, especially in under-studied regions such as Africa and South America. The study results were published in the online journal Scientific Reports.  Invasive species are animals, plants or other living things that aren’t native to the places where they live and damage …

A bill enhancing health care and disability benefits for millions of veterans exposed to toxic burn pits won final approval in the Senate on Tuesday, ending a brief stalemate over the measure that had infuriated advocates and inspired some to camp outside the Capitol. The Senate approved the bill by a vote of 86-11. It now goes to President Joe Biden’s desk to be signed into law. Biden described the legislation as the biggest expansion of benefits for service-connected health issues in 30 years and the largest single bill ever …