The National Oceanic and Atmospheric Administration said reefs are showing signs of stress brought on by ocean temperatures that have set daily records for more than a year.
The executor, Malcolm LaVergne, who was Simpson's longtime lawyer, said he also wants to "tone down the rhetoric" with the Goldman family after Simpson's death.
PFAS are a class of chemicals that can linger almost permanently in air, water and soil. Research suggests they are associated with a variety of health issues, including cancer.
The episode has imperiled the reputation of the Harvard-affiliated Dana-Farber Cancer Institute and raised questions about the work of one high-profile researcher.
His work helps scientists understand one of the most fundamental riddles of the universe: how the Big Bang created something out of nothing 13.8 billion years ago.
NBC News climate reporter Chase Cain is at an Arkansas nature preserve for a first hand look at how animals in the wild respond to the total solar eclipse.