Science - USA (2021-07-09)

data ofBobcurds. We confirmed the previously identified mutation in theBobCALgene (fig. S4A) ( 4 , 5 , 7 ) and observed that the ...

MARTIAN GEOLOGY Brine-driven destruction of clay minerals in Gale crater, Mars T. F. Bristow^1 *, J. P. Grotzinger^2 , E. B. Ram ...

The flat-lying bedding of the rocks, and the geomorphology of the GT topographic trough, mean that strata exposed in GT are late ...

magnesium-rich, silica-poor mafic and ultramafic volcanic rocks, as well as magnesium-rich sedi- mentary precursors (typically c ...

lithologies in Gale’s catchment transported to the crater floor by rivers. Talc- and serpentine-bearing ultramafic rocks are pro ...

Hypothesized fluid sources include (i) heated water migrating from the deeper parts of the crater or (ii) gravity-driven regiona ...

Orbital sulfate detections could also originate from sulfate-cemented clastic sedimentary rocks deposited in aqueous or eolian s ...

the period in which Mars had surface liquid water. REFERENCES AND NOTES C. E. Weaver,Clays, Muds, and Shales(Elsevier, 1989), p ...

streams ( 7 , 8 ). He noted that offset increases channel length without changing the drop in elevation (Fig. 1A), thus reducing ...

( 15 ). Finally, by combining Eq. 1 and Eq. 2 and approximating the integral in Eq. 1 as a product, we obtain a characteristic a ...

transport rates are high, the evolution of chan- nels after individual earthquakes on centennial time scales may better capture ...

MECHANOCHEMISTRY Flyby reaction trajectories: Chemical dynamics under extrinsic force Yun Liu1,2, Soren Holm3,4,5, Jan Meisner3, ...

bisalkenes in an 8:1 ratio. The observation of (E,Z) by-product from theU-isomer suggests that the two radicals behave independe ...

the same sonication conditions, mechanochem- ical production ofa,b-conjugated diesters was observed for theA- andD-isomer (fig. ...

compounds (Fig. 4A). When the pulling force was varied from 1 to 2 nN, energy barriers of the second scissions were lowered by 2 ...

At 1.3 nN, the NDEs improve product selec- tivity by fourfold forUin comparison to the statistical outcome. The apparent enhance ...

SUPERCONDUCTIVITY Magnetic excitations in infinite-layer nickelates H. Lu1,3, M. Rossi^1 , A. Nag^2 , M. Osada^3 ,D.F.Li^1 †, K. ...

measurements, we adopted an experimental geometry well established to measure mag- netic spin excitations in transition-metal ox ...

whereSi,Sj, andSi′denote Heisenberg spins at sitei, nearest-neighbor sitesj, and the next- nearest-neighbor sitesi′, respectivel ...

The other notable behavior revealed by the fits is in the spin wave damping factorgq(Fig. 3). The width of the magnetic peaks (~ ...