Contrails are created by jet engines cruising at altitude. Is it a cause for worry? Not in the way you might think. When you purchase through links on our site, we may earn an affiliate commission.

Online military forums like SecretProjects went wild last year over a grainy, indistinct image of an aircraft. Basic digital enhancement showed a bat-winged craft unlike any known U.S. military plane, ...

Long-lived contrails form predominantly not in cloud-free skies, but within already existing ice clouds. This is the conclusion reached by a team of scientists from Forschungszentrum Jülich, the ...