 Scientists are getting an astronaut's eye view of what's mucking up Earth's oceans. Ocean trash is such a big problem that scientists have now designed a new sensor to track marine litter from space. Trash in the ocean is any human-made item that ends up in water, and 80% of it is made of plastic. Scientists are now able to use a space satellite to detect hot spots and identify trends to get an unprecedented view of how marine litter enters the ocean and where it is distributed. With better satellite detection,