More frequent access Asparouhov said that several trend lines have converged, enabling Varda and United Therapeutics to collaborate. There is the bedrock of research done on board the ISS, increased capital for space startups like Varda, and the rise of reusable rockets that has brought down the cost of access to space and increased the cadence. Varda’s spacecraft, with a mass of a few hundred kilograms, typically fly on SpaceX’s periodic Transporter missions that launch dozens of space missions at a time. Although he declined to discuss the explicit financial details of this agreement, Asparouhov said it will allow his company and United Therapeutics to do a large number of screening tests on the ground, principally in Varda’s new 10,000 square-foot pharmaceutical lab in El Segundo, California, and then to take these most promising applications to space. Over time, scientists have come to understand that when molecules assemble in microgravity—that is, in Earth orbit—they do so more slowly and consistently.…