Astronomers have captured images of two stellar explosions—known as novae—within days of their eruption and in unprecedented ...

The speed at which glaciers move changes predictably each year, according to the first-ever global map of how glacier and ice sheet speeds vary with the seasons. Knowing this yearly rhythm could help ...

"It means cleaning house, narrowing the viable paths forward, and no longer spending energy on what are evidently dead ends." ...

NPV calculates profitability using all projected cash inflows and outflows, considering time value of money. A positive NPV suggests a profitable project; a negative NPV suggests a loss. NPV's ...