[BLOG] Five D-Brief links: microbiome, genetic engineering, elephant ivory, Moon, O’Neill colonies

• D-Brief examines the importance of the microbiome in human beings.
• D-Brief observes that the genetic engineering of two twins in China to make them resistant to HIV might also shorten their lifespans.
• The poaching of elephants, happily, is decreasing as demand for ivory goes down worldwide. D-Brief reports.
• D-Brief takes a look at the history of imagined landings on the Moon.
• D-Brief looks at the long history of O’Neill colonies in popular culture, as imagined settlements in space itself.