the NASA Innovative Advanced Concepts program with a phase-I study in 2016, and a phase-II study from 2017-2018.

Rover design
Though the JPL team initially planned to design an entirely mechanical rover, this was soon deemed to be impractical compared to a hybrid mechanical-electric design. 

AREE's unique feature is the proposal to use a mechanical analog computer instead of the more powerful, electronic digital computers used in other robotic spacecraft, which are not tolerant to the high temperatures of Venus. Instead of using a single general-purpose mechanical computer, like Babbage's analytical engine, the rover would rely on a suite of simpler, single-purpose devices distributed throughout the vehicle, analogous to World War II shipboard fire control computers. The rover would also use purely mechanical sensors for some of its instrumentation: temperature,the United States were obtained from the National Center for Health Statistics. From these data the lifetime risk of death from germ cell cancer in the general population was calculated for each 5-year interval between ages 15 and 60 years. Since the lifetime risk of germ cell tumor is believed to be higher in patients with cryptorchidism than in the general population, the lifetime risk of eventual death from germ cell tumor in the cryptorchid population was calculated by multiplying each 5-year lifetime risk by 9.7, which is the generally accepted relative risk of germ cell tumor in a cryptorchid testis. Contemporary literature on perioperative mortality was reviewed and we estimated the current mortality of orchiectomy based on American Society of Anesthesiologists (ASA) class. Mortality rates were plotted