retreat

The explanation comes from the repeated advance and retreat of glaciers during a previous martian ice age.

The term, which describes young adults who retreat into small rooms, avoid socializing and spend long stretches in bed scrolling on their phones, has exploded across platforms and accumulated billions of views.

Turns out that retreating from head coach to offensive coordinator wasn’t a great fit for Chip Kelly.

"Too many countries are retreating into geopolitical blocs or the battlegrounds of protectionism," he said, but added: "In every rupture resides the responsibility to build -- nostalgia is not a strategy."

Without fresh food and ammunition, Ukraine's frontline soldiers would face a choice of either surrender or a costly retreat.