Contrails are clouds formed when water vapor condenses on the soot emitted by jet engines.Markus Meinka/Alamy stock photo Planes flying at higher altitudes create longer-lasting vapor…
Ships waiting to enter the Panama Canal in August 2023Bienvenido Velasco/EPA-EFE/Shutterstock The Panama Canal is one of the greatest engineering achievements of the 20th century. Since…
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