There’s an interesting development in amateur ballooning: using so-called superpressure balloons, which float high in the atmosphere indefinitely rather than simply going up and up and then popping ...

It makes sense that a balloon filled with a lightweight gas such as helium would float when surrounded by heavier air. But why does filling a huge balloon with hot air also make it float? This ...

Make sure that your climate control is turned off and your windows are rolled up. Otherwise, small air currents may interfere with the results of your experiment. If your vehicle has a middle row of ...