PIA23668: Dunes Frozen in Time

           Target: Mars Mission:  Mars Reconnaissance Orbiter (MRO) Instrument:  HiRISE Image Credit: NASA/JPL-Caltech/University of Arizona …

PIA23667: Streamers of Frost

           Target: Mars Mission:  Mars Reconnaissance Orbiter (MRO) Instrument:  HiRISE Image Credit: NASA/JPL-Caltech/University of Arizona …

PIA23666: A First Look at a Gullied Slope

           Target: Mars Mission:  Mars Reconnaissance Orbiter (MRO) Instrument:  HiRISE Image Credit: NASA/JPL-Caltech/University of Arizona …

A secreted signature of aging cells

Senescent cells undergo an irreversible and permanent arrest of cell division and are hallmarks of both…

Efficacy of drugs against pork tapeworm

Taenia solium — also called pork tapeworm — is a parasite which causes disease around the…

New model shows how crop rotation helps combat plant pests

A new computational model shows how different patterns of crop rotation — planting different crops at…

Mosquitoes engineered to repel dengue virus

An international team of scientists has synthetically engineered mosquitoes that halt the transmission of the dengue…

Microscopy technique reveals cells' 3-D ultrastructure in new detail

Inside a cell, tentacled vesicles shuttle cargo for sorting. DNA rearranges in the nucleus as stem…

In death of dinosaurs, it was all about the asteroid—not volcanoes

Volcanic activity did not play a direct role in the mass extinction event that killed the…

New model shows how crop rotation helps combat plant pests

A new computational model shows how different patterns of crop rotation—planting different crops at different times…