In addition to this, it's important to note a class of scientific experiments that cannot be done by satellites that the ISS has been at the forefront of: resea

In addition to this, it's important to note a class of scientific experiments that cannot be done by satellites that the ISS has been at the forefront of: researching the prolonged effects of micro-gravity and space-flight on the human body. This will be very relevant if we intend to send people to Mars or back to the Moon.