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Self-replicating Chernobyl mold could protect the ISS from space radiation

Radiation shields made from living organisms could help us head deeper into the cosmos.

Read here
John Priscu’s search for life that thrives under ice took him to subglacial lakes at the South Pole.
Now he has his eye on Mars and Europa.

The microbial ecologist John Priscu, one of the foremost experts in the study of microorganisms that survive in frozen environments, stands in his sub-zero laboratory at Montana State University. Read here
​​For the first time, scientists have observed that 'megaripples' on Mars – huge sand waves seen on the Martian surface – are moving structures, and not ancient relics stuck in place since the Red Planet's distant past.

Sand dunes and ripples are typical features of deserts on Earth and Mars. Megaripples are distinguished from smaller ripples by the coarser sand grains that gather at their crests and their larger size: the ripples range from 30 centimeters (1 foot) to tens of meters across.

This video shows movement of Martian megaripples in several locations on the Red Planet. You can see the slight change in the ripples’ position over the course of seven to ten years.
Read the original research study here: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JE006446
Modified gravity theories have never been able to describe the universe’s first light. A new formulation does.

A view of the center of the Milky Way galaxy. Theories of modified gravity have had a hard time describing the universe from relatively small scales like this all the way up to the scale of the universe as a whole.

For decades, a band of rebel theorists has waged war with one of cosmology’s core concepts — the idea that an invisible, intangible form of matter forms the universe’s primary structure. This dark matter, which seems to outweigh the stuff we’re made of 5-to-1, accounts for a host of observations: the tight cohesion of galaxies and packs of galaxies, the way light from faraway galaxies will bend on its way to terrestrial telescopes, and the mottled structure of the early universe, to name a few.

Read on Quanta