A't'trr

"We are also here"

- The A't'trr talking through O'Neil

The A't'trr are an advanced alien hive mind encountered in the early days of Stargate SG1.

Appearance
The A't'trr are actually thousands of microscopic creatures impossible to see with the naked eye. Collectively they flourish in ultraviolet light; revealing electric blue tendrils wherever they have spread. When feeding, they glow.

Abilities and Technology
The A't'trr feed on heat and oxygen. They can withstand extreme temperatures such as direct exposure to a blow torch, or the heat of an explosion. They claim that an explosion that would destroy the SGC would be enough to allow them to spread across the planet.

Once they reach a large enough number they can express their hive intelligence allowing them to communicate with other lifeforms. Despite their small size they are an advanced race as event by the remains of the city on their home worls and their Orb.

In the Series
Prior to encountering SG1 the A't'trr discovered that their homeworld was becoming uninhabitable. Unable to save their world they created a cryogenic device called the "Orb" to cryogenically preserve the species. They planned to wait untill another species would come and take the orb through the Stargate to a new home.

The Orb was eventualy discovered by SG1 who took it back to Earth to study. Exposed to the atmoshphere of a living world the Orb soon started to activate. Panicking, the SGC decided to send it back through the gate. Realising what they intended to do, the A't'trr released several spikes from the orb imbedding them into the gate room and trapping O'Neill who was pinned by one of the them.