NASA article shows that EARTH is part of small galaxy colliding with milky way anyone see this- I cant find it?

I saw a link to a report that the Earth is part of a smaller galaxy that is colliding with the milky way. Nasa sent two satellites above and below the galaxy to map stars and discovered that the milky way is in a collision with a 2nd system, of which the Earth is part of. The article clearly showed the mapped stars. This explains why the earth wobbles up and down on the flat plane of the Milky Way, unlike all the other Milky Way stars and planets. This also explains why Earth is above the plane, and now entering the flat region densely populated with debris for 2012, likely to cause asteroid / meteor/ debris collision on Earth such as caused the extinction of the dinosaurs. I lost the LINK on NASA - has anyone else sen this NASA report? Thanks