It's important to stress that surface temperatures are naturally higher than the air temperatures measured by weather stations.

CNN: Think it's hot? Imagine living here

The ice then melts, leaving a space below the surface, which caves in under the stress of vehicles and eventually forms a pothole.

BBC: Jetpatchers at work

Experts stress that while pointers on approachability may, on the surface, seem like total no-brainers, all are elements of socializing that people struggle to both recognize in themselves and correct.

FORBES: Subliminally Standoffish: Secret Signals That Say You're Unapproachable

Stress leave and therapy all worked to pull me back to the surface, but I was no longer the same person.

BBC: How we quit our jobs to travel: The cubicle dwellers

Corals 'bleach' when they are under stress, which typically has been caused by an increase in sea-surface temperatures (but which could be also brought on by variations in light, carbon dioxide (CO2) levels or pollutants).

CNN: All About: Coral Reefs