It is in the crus that the classic venous stasis ulcer occurs. Vessel obstruction will then lead to different pathological issues such as blood stasis and ischemia. The bursts are followed by periods of stasis or equilibrium to accommodate new arrivals. In 1628, William Harvey discovered the link between venous stasis and the external pressure. There are real phenomena that cause time dilation similar that of a stasis field. Persistent adaptation within an adaptive zone is a common explanation for morphological stasis. Thanos is trapped in a pocket limbo of stasis by his son. Other anatomic abnormalities such as tumors may also lead to stasis or motility issues. The facehugger attacks the Predator, but both become trapped in the stasis field. This in turn can lead to urinary stasis and drainage issues. The formation is thought to be primarily due to blood flow stasis. The columnar epithelium plays a key role in balancing milk production, milk stasis and resorption. Many hypotheses have been proposed to explain the putative causes of stasis. Brainiac manages to take advantage of this, escaping from his drained stasis field. Lyra later infiltrates the Intelligencia, where she finds Jennifer in stasis.