Yes, humans on Mars would experience slightly shorter life spans compared to humans on Earth due to the effects of gravitational time dilation. The phenomenon of time dilation arises from the theory of general relativity, which describes how gravity affects the curvature of spacetime.
Mars has a weaker gravitational field compared to Earth, with its surface gravity being about 38% of Earth's gravity. This weaker gravity leads to a smaller gravitational time dilation effect on Mars compared to Earth.
According to the principle of gravitational time dilation, time moves slower in a stronger gravitational field. So, an observer on Mars would perceive time passing more quickly compared to an observer on Earth. This means that from the perspective of someone on Earth, the individuals on Mars would age slightly faster.
The difference in life span, however, would be very small and likely not directly observable or significant in practical terms. Other factors such as the environment, lifestyle, medical care, and genetic factors would have a more substantial impact on the life spans of individuals.