Inflated balloons that trick the stomach into feeling full have long been used for weight loss. The problem is that they become less effective the longer they stay inflated. Now, MIT engineers have ...
While the flight in itself was impressive, the process of filling the balloon with hydrogen gas before take-off was also an incredible feat. This was achieved by pouring concentrated sulphuric ...
But when it comes to controlled long-distance flight, gas-filled balloons are also limited. As the sun heats the gas in the envelope, the balloon rises uncontrollably and so gas has to be vented ...