small size

"First of all, their small size. They can hide in a lot of different places. They also have a relatively short life cycle, so the populations are able to grow very quickly, almost exponentially within a home. And that also means you can get insecticide resistance in a population very quickly because that population is turning over and growing so fast."

Because of their different physiology, small size, dependence on adults and still-developing organs, the youngest among us are uniquely vulnerable to the health threats posed by a warming world — by heat waves, wildfires, hurricanes, infectious diseases, air pollution and more.

Because of their small size, PanINs are challenging to detect and cannot be identified by a typical radiology examination.

It has been easy to roll out the new anti-malaria project due to Djibouti's small size, a mostly urban country of slightly over a million people, the organisers said.

Norfolk Southern officials said they believe the relatively small size of this settlement reflects how much the railroad has already done, including paying $780 million in cleanup costs and providing $107 million in aid to residents and the communities affected.