Religious theists who believe that everyone worships something and has some sort of religion will at times conclude that atheists' religion must be science. Science is not only secular and godless, but has also been responsible for overturning many of the myths, doctrines, and beliefs which have been fundamental to theistic religions. Science conflicts with religions not because it is a religion itself, but because religions typically conflict with reality. No one worships science, though.
Read Article: Myth: Atheists Worship Science, Evolution is Atheists' Creed, Darwin a Prophet