Anemoi four Anemoi and several minor wind gods are involved in the defense of Mount Olympus against Kronos (the Titan Cronus), the first series's chief antagonist. Both the Greek and the Roman forms of the Anemoi appear in Riordan's second series. Boreas is a central character in "The Lost Hero", and his children Khione, Calais, and Zetes continue to have important roles throughout the series. He resides in Montreal, and is described as "sturdily built...with dark purple wings" when in his Greek form, and as "taller and thinner" when Roman. "Notus/Auster appears in "The House of Hades" as a counselor of
Project Boreas rovers or from the station. The design study investigated communications for Pole Station and satellite requirements for sustaining base to field communications. The unique psycho-social issues associated with the long and permanently dark Martian polar winter were addressed. Medical requirements for long-term operation at the Martian polar ice caps were investigated in addition to the nutrition requirements, which were used to constrain the life support system design. The Project Boreas report was shortlisted for the 2007 Sir Arthur Clarke Award in the category of "Best Written Presentation". Project Boreas Project Boreas was a study conducted between 2003 and 2006 by