Note that the title was edited (by a mod?) from my stylised version (oops - I had used the tweet title) to "Engineering Habitats for the Moon and Mars" which is

Note that the title was edited (by a mod?) from my stylised version (oops - I had used the tweet title) to "Engineering Habitats for the Moon and Mars" which is actually a subheading within the article. The actual title is "Structural Challenges for Space Architecture."