it says on the website,. that they cool them to -300 degrees,... so, im not sure if its farenheit or celcius,... but i thought you couldn't get anything colder than -273 celcius,. of course im probably mistaken,. i was only saying,. -273 degrees celcius is absolute zero,.. or should be... 0 K or zero kelvin,. i dunno about all this,. i will ask my chemistry teacher tomorrow, and update you guys on what i found out..