https://www.livescience.com/64304-dark-fluid-negative-mass-dominates-universe.html
Forget about dark matter and dark energy, new research suggests that the existence of 'dark fluid' may solve some of the biggest mysteries in physics.
dark fluidnegative massbizarrecoulddominate
https://www.nist.gov/publications/negative-cesium-sputter-ion-source-generating-cluster-primary-ion-beams-secondary-ion
The use of a cluster (or polyatomic) primary ion projectile for organic SIMS has been demonstrated to increase the yield of characteristic molecular secondary i
ion sourcenegativecesiumsputtergenerating