Scientists would like to prevent something like that from happening in the future, but it would take time to figure out how to best knock an incoming asteroid off its collision course.

Being caught in the fog, people felt their way along the walls of houses with one hand, while they put out the other in front of them so as not to knock against something or somebody.

Being caught in the fog, people felt their way along the walls of houses with one hand, while they put out the other in front of them so as not to knock against something or somebody.