Carbon dioxide in Earth's atmosphere just reached a major milestone
September 29, 2016, 9:36 a.m. by Russell McLendon
CO2 data from Mauna Loa in Hawaii suggest 400 ppm is the new normal.
7 new telescopes that will change the way we see space
September 26, 2016, 10:19 a.m. by Russell McLendon
A new age of astronomy is dawning, thanks to a historic building boom of futuristic telescopes.
6 things to know about Earth's 6th mass extinction
September 15, 2016, 1:11 p.m. by Russell McLendon
At least five similar die-offs have happened before, but this is the first in human history — and the first with human help.
Threatened loggerhead sea turtles are nesting in record numbers
September 7, 2016, 11:28 a.m. by Russell McLendon
The loggerhead population was in decline for decades, but Florida, Georgia and the Carolinas are reporting a record number of nests in 2016.