occurring

This means that cell density is a broadly applicable tool for guiding both engineered and naturally occurring cells to build a vast array of structures, tissues, and organs.

AEP or "Annual Exceedance Probability" is used to express the likelihood of a flood occurring in a given area each year.

"It also recruits naturally occurring antibodies to fight the virus."

Fluoride - a naturally occurring mineral recognised to protect teeth against decay - is added to water supplies in many countries, including the US, where around 63% of the population have fluoridated water.

"This unusual behavior with locally occurring stretching and compression is impossible in conventional materials," said Jonathan Schneider of APH, another co-author.