Mars

Scientists find likely source of methane on Mars

Iron-oxidizing bacteria live in environments as extreme as the deep ocean and as common as roadside ditches. A recent paper in Frontiers proposes distributing the iron that these bacteria naturally produce to 'fertilize' phytoplankton and help remove excess carbon dioxide from the atmosphere. Credit: Bigelow Laboratory for Ocean Sciences

Study Looks to Iron from Microbes for Climate Help

Hurricane Irma forming over the Atlantic Ocean in September 2017.

Large volcanic eruptions can alter hurricane strength and frequency

Crocodylomorphs were a highly morphologically and ecologically diverse clade. These extinct crocodile relatives had a much richer variety of skull shapes than living crocodilians, suggesting a wide range of feeding strategies. Credit: Darren Naish, Tetrapod Zoology

Untangling the evolution of feeding strategies in ancient crocodiles

Horseshoe Bend, Arizona

Horseshoe Bend, Arizona

plate boundaries

What are the different types of plate tectonic boundaries?

K-T Boundary / K-Pg Boundary

K-T Boundary “Cretaceous-Tertiary Boundary”

Badlands near Drumheller, Alberta

K-Pg Boundary “Cretaceous–Paleogene Boundary”

Fossilized fish piled one atop another

66-million-year-old deathbed linked to dinosaur-killing meteor

In ancient oceans that resembled our own, oxygen loss triggered mass...

1...145146147...686Page 146 of 686