Several people were also injured in the incident on Monday at the popular tourist site, say Mexican officials.
A stellarator is difficult to build, but could it be the best way to make fusion energy work?
While UK unemployment is at a five-year-high, increasing numbers of those in work have more than one job.
One petrol retailer says he is experiencing about five drive-offs a week at each forecourt, costing him thousands.
The final design for a statue of the late Queen Elizabeth is to be unveiled, 100 years after her birth.