NASA’s Brookhaven National Laboratory is coming under intense scrutiny this week following complaints that its forthcoming $1.75 million radiation experiment on monkeys violates a score of animal-rights laws. The Physicians Committee for Responsible Medicine (PCRM) on Monday filed an official complaint against the space agency, which approved a grant for the experiment last year to understand the effects of long-term radiation exposure on the human body in space. While NASA’s lab has maintained the experiment is necessary if humans expect to travel to Mars, the committee stressed in its letter that researchers were still wrong to subject monkeys to such inhumane conditions.