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Ukrainian scientists, Kasianchuk and Reshetnyk, propose riding asteroids to Mars and Venus to save operational costs. While the idea might sound a bit bizarre, they trust the intellect behind their science.

Recent research suggests that eliminating the need for a spaceship can reduce the cost-per-trip to Mars from Earth.

Riding Asteroids to Mars: Revolutionary Plan for Affordable Space Travel
Two scientists from the University of Kyiv in Ukraine have published a paper that analyses the orbit of over 35,000 asteroids. Their work deals with studying and observing these celestial objects to identify the possibility of them making an Earth-Mars trip.

Already, there are over 120 asteroids that AS Kasianchuk and VM Reshetnyk have shortlisted in hopes that they will serve the purpose of this study.