Science facility

Reduces shield and energy to 0 for all enemy or allied units within the blast radius. Particularly useful against protoss units and buildings.

Reduces the hit points of biological units near the targeted unit (and the targeted unit itself if it is biological) by 250 over 30 seconds. Mechanical units are immune, but biological units passing near an irradiated mechanical unit will still be affected.

The science facility can add a physics lab to itself, enabling production of battlecruisers and researching abilities and upgrades for them. This prevents the science facility from building a covert ops.

The science facility can add a covert ops facility to itself, enabling production of ghosts and researching abilities and upgrades for them. This prevents the science facility from building a physics lab.

This structure can lift off, enabling it to fly. It cannot produce units or conduct research while in flight, and must leave add-ons behind.