The Sky-Sailor is a concept for a robotic aircraft with embedded solar cells on its wings, conceived in 2004 by the Swiss Federal Institute of Technology in Zurich. It is hoped. Sky-Sailor would be an autonomous, solar-powered Mars aircraft that would fly for one Martian day of 24 hours and scan features on the surface of Mars. If this project is funded and developed, it would be able to take detailed pictures of Mars in places where wheeled rovers cannot go; the challenge for the developers was to make a light weight model, accomplished. After that, an autopilot had to be installed so a non-stop autonomous flight for 24 hours could be achieved. All this was tested with a scale model in a wind tunnel. Two major challenges for small autonomous aircraft for Mars are to keep the weight down, such as batteries and electronics and the other is designing the autonomous control systems for directing the flight; some design considerations is the amount of solar power available over the course of a Martian day, another is the battery storage capacity, the efficiency and weight of the solar cells.

One reason for a small size, was to facilitate its transport to planet Mars from Earth. The Sky-Sailor concept has a wingspan of about 3.2 meters and it weighs 2.5 kilograms. Aerodynamic studies suggest the power needed for the aircraft to fly at a low altitude is about 13.2 watts. In 2007 a solar powered prototype made two flights totaling 10 hours. With a new battery, in 2008 it flew for 27 hours. If developed, the aircraft would be carried to Mars in a small aeroshell and that would be attached to a carrier spacecraft. Once the spacecraft has reached Mars, the aeroshell would be directly released into the Martian atmosphere. In 12 hours it could cover about 1,700 km with the flight culminating in a crash landing. ARES Helios Prototype Mars aircraft Mini-Sniffer

Rhonda Rosengren

Rhonda J Rosengren is a New Zealand toxicology academic, as of 2019 is a full professor at the University of Otago. After at Texas A&M University, Rosengren moved to the University of Otago. Most of Rosengren's research involves the toxicology of oncology drugs. Stuart, Emma C. Marissa J. Scandlyn, Rhonda J. Rosengren. "Role of epigallocatechin gallate in the treatment of breast and prostate cancer." Life sciences 79, no. 25: 2329–2336. According to Google Scholar, this reference has been cited 167 times by July 2019. Scandlyn, Marissa J. Emma C. Stuart, Rhonda J. Rosengren. "Sex-specific differences in CYP450 isoforms in humans." Expert opinion on drug Metabolism & toxicology 4, no. 4: 413–424. According to Google Scholar, this reference has been cited 127 times by July 2019. Alexander, Paul F. Smith, Rhonda J. Rosengren. "Cannabinoids in the treatment of cancer." Cancer letters 285, no. 1: 6-12. According to Google Scholar, this reference has been cited 125 times by July 2019. Somers‐Edgar, Tiffany J. Marissa J. Scandlyn, Emma C.

Stuart, Martin J. Le Nedelec, Sophie P. Valentine, Rhonda J. Rosengren. "The combination of epigallocatechin gallate and curcumin suppresses ERα‐breast cancer cell growth in vitro and in vivo." International journal of cancer 122, no. 9: 1966–1971