Every breath you take contains a molecule of history
‘Caesar’s Last Breath’ tells the stories of invisible gases
![painting of Caesar’s last moments](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/06/070817_reviews_main.jpg?fit=860%2C460&ssl=1)
OUT OF BREATH Caesar’s last moments have inspired much scientific thinking, as well as a new book.
VINCENZO CAMUCCINI/WIKIMEDIA COMMONS