Kovács and his team were examining an area of space called the CMB Cold Spot, a huge, abnormally cold stretch of universe that was discovered 10 years ago. Researchers speculated that the spot was a supervoid, but there was no evidence that such a void existed. The researchers used Hawaii's Pan-STARRS1 (PS1) telescope and NASA's Wide Field Survey Explorer (WISE) satellite to examine the area that is 3 billion light years away. After conducting a targeted astronomical survey of the area, they demonstrated that about 10,000 galaxies were missing from that area of the universe. This leaves one explanation: the supervoid, which lead researcher István Szapudi said could be “the largest individual structure ever identified by humanity.” The supervoid drains energy from light that travels through it, leading to a drop in temperature.