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Solar system’s gas giants, such as Jupiter, Saturn, and massive exoplanets, were formed via the gas accretion onto the solid cores, each with a mass of roughly 10 Earth masses. However, rapid migration due to disk-planet interaction prevents the formation of such massive cores via accretion of planetesimals. Comparably rapid core growth via pebble accretion requires very massive protoplanetary...
Solar system’s gas giants, such as Jupiter, Saturn, and massive exoplanets, were formed via the gas accretion onto the solid cores, each with a mass of roughly 10 Earth masses. However, rapid migration due to disk-planet interaction prevents the formation of such massive cores via accretion of planetesimals. Comparably rapid core growth via pebble accretion requires very massive protoplanetary...
Archaeologists have unearthed the earliest micro-botanical evidence of the summer grain broomcorn millet (Panicum miliaceum) in Mesopotamia, identified using phytoliths (microscopic plant remains) in dung-rich sediments from Khani Masi, a mid-second millennium BCE site located in northern Iraq. Panicum miliaceum (left) and Echinochloa crus-galli. Image credit: Otto Wilhelm / Biolib.de. Multi-cropping...Starrett Outside Micrometer No. 226, 4-5 Inches (Inv.34918)
The nearly complete humerus — or upper arm bone — of a pangolin from the paleontological site of Grăunceanu in Romania definitively demonstrates that these animals were present in Europe during the Pleistocene epoch. The giant pangolin (Smutsia gigantea) by Joseph Wolf. Pangolins are mammals of the order Pholidota known from Asia and Africa. The one living family of pangolins, the Manidae,...
A vast breeding colony of a fish species called the Jonah’s icefish (Neopagetopsis ionah) has been discovered in the southern Weddell Sea, Antarctica. The nests of the Jonah’s icefish (Neopagetopsis ionah) in the Weddell Sea, Antarctica. Image credit: Purser et al., doi: 10.1016/j.cub.2021.12.022. The Jonah’s icefish is a species of notothenioid fish in the family Channichthyidae (crocodile...
A team of physicists from the United States and China has detected the unexpected signatures of strange metallicity in a material in which electrical charge is carried not by electrons, but by more ‘wave-like’ entities called Cooper pairs. Scanning electron microscopy image of a nanopatterned YBa2Cu3O7−δ (YBCO) thin film. The 12-nm-thick nanopatterned YBCO thin film was fabricated by reactive...
On Earth, our bodies create and destroy 2 million red blood cells every second. In a new study published today in the journal Nature Medicine, a team of scientists from the Ottawa Hospital Research Institute and the University of Ottawa found that astronauts were destroying 54% more red blood cells during their 6-month missions onboard the International Space Station, or 3 million every second. Trudel...
Researchers from the University of Adelaide and elsewhere have sequenced and analyzed mitochondrial DNA from fossils of cave lions (Panthera spp.) and brown bears (Ursus arctos), two megafaunal carnivorans that dispersed from Eurasia into North America during the Pleistocene, to better understand the timing and drivers of their past movement between the continents across the Bering Land Bridge. Their...
Calcium silicate perovskite (CaSiO3) is arguably the most geochemically important phase in the Earth’s lower mantle, because it concentrates elements that are incompatible in the upper mantle. No one has ever successfully retrieved this high-pressure compound from the lower mantle before. This is because CaSiO3-perovskite is ‘unquenchable,’ meaning that it cannot retain its structure after...Polymer Clay Cane, Rose Flower by Jane Z Handmade Choose Colors
A team of physicists from the United States and China has detected the unexpected signatures of strange metallicity in a material in which electrical charge is carried not by electrons, but by more ‘wave-like’ entities called Cooper pairs. Scanning electron microscopy image of a nanopatterned YBa2Cu3O7−δ (YBCO) thin film. The 12-nm-thick nanopatterned YBCO thin film was fabricated by reactive...