Today, Jim Henson’s dark fairytale is seen as a classic of 80s high camp. But on release, it bombed. Here, members of the cast and crew remember laughter, tricky puppets and Henson’s ‘joyful magic’ ...

Solar power towers can play an important role in the energy transition. They convert sunlight into heat that can be stored or used to generate electricity. Until now, however, data to test new methods ...