Last February, Alice Gilman, the cofounder and chief operating officer of a secretive Silicon Valley longevity startup called R3 Bio, sat for an interview with podcast Skyline Drive. In the interview, she discussed R3 Bio’s aspirations to grow nonsentient humanoid life-forms — from which, in theory, they can grow and harvest organs for implantation into human bodies, or to test future drugs and other treatments without the need for live animal t…