My team and I put the best Adobe Acrobat alternatives to the test - so if you need a PDF editor and don't want to pay Adobe's Creative Cloud subscriptions, these are the ones I recommend.

In 1997, researchers quantified that the shark-skin-style riblets can reduce drag on airplanes by nearly 10 percent. However, commercial testing on real aircraft didn’t begin until 2016.

Alaska has few roads, leaving many communities to rely on small airplanes to get around. Last month 10 people died when a small commuter plane that was overweight by half a ton crashed onto sea ...

Editor’s Note: The views expressed in this commentary are solely those of the writer. CNN is showcasing the work of The Conversation, a collaboration between journalists and academics to provide ...

(This story was updated because an earlier version included an inaccuracy.) Three civilian aircraft violated the restricted airspace over Mar-a-Lago on Saturday when President Donald Trump was in ...

Five people on board a small airplane that crashed into the parking lot of a retirement community in southern Pennsylvania on Sunday survived and were taken to hospitals, authorities said.

One should never, for example, let the flag touch the ground. Yet some airplanes appear to violate proper flag standards by depicting it backwards on the aircraft, with the canton, or star-filled ...

On Feb. 17, a plane was unable to land safely at a Toronto, Ontario, airport and flipped over on the runway. Nobody died, but 21 people were taken to hospital with injuries. A few weeks earlier ...

China’s highest court has called for a crack down on the activities of paper mills, businesses that churn out fraudulent or poor-quality manuscripts and sell authorships. Some researchers are ...

For most people, Adobe Acrobat Reader remains a great tool for anyone who needs to read or lightly modify PDF files, and I especially like its cross-platform compatibility, letting you freely view ...

Andrew Sommers does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...