Boulder, Colorado is again under a red flag warning for extreme wildfire danger as powerful winds like those that fanned a destructive blaze in December return to the drought stricken region.
The orange excrement of the critically endangered North Atlantic right whales — so called because they were once seen as the right ones to hunt — can give researchers a window into their health.
The variants — BA.2.12.1 and BA2.12.2 — have been detected in New York and other states as well as 5 other countries. One has a mutation that seems to give it an edge in evading the immune system.
A new study links the epidemic of severe lung disease among coal miners to toxic silica dust. The findings echo a 2018 investigation by NPR and the PBS show Frontline.
The comet, known as C/2014 UN271 (Bernardinelli-Bernstein), has an estimated diameter of about 80 miles. That's bigger than Rhode Island and about 50 times larger than the heart of most comets.
A new look at some fossilized footprints shows that more than one species of human was walking upright around 3.6 million years ago. (This story originally aired on ATC on Dec. 2, 2021.)