However, a technical quirk made it impractical. To get the right sort of forces, the tether would need to be pointed "downward" toward the Earth or "upward" away from the planet. No matter the ...

DARPA scientists are exploring ways to grow massive biological objects, such as telescope antennas or huge nets to snag debris, in space ...

DARPA wants space structures that are grown rather than built, and the building blocks for these new structures are living ...