change in the types of fossils it contains when compared to the layers above and below it. Another significant feature of the K-Pg boundary is the fact that it is enriched with iridium ...

Although the troposphere is often thought of as the closest layer of the atmosphere to the Earth's surface, the planetary boundary layer ... working on this type of remote sensing with NASA ...

Formally, both types of drag are due to viscosity (if the body was moving ... The size of the wake decreases, indicating that the boundary layer separation on the cylinder or sphere occurs further ...