Science often proves many religious beliefs wrong, but what area of study (to YOU) supports your conclusion the strongest?
For me it's neurology. Your entire being is just chemicals and electrical pulses in an organ in your skull. When your brain stops producing those chemicals, you go away. When you die, your brain stops firing, you lose consciousness and go away (as in no afterlife). Our current knowledge of the brain can explain thoughts, memories, emotions, and your entire being.
Granted a higher being could exist without an afterlife existing, but he/she/it is so obviously uninterested in us that I'm uninterested in him/her/it.
Other branches include:
geology (Earth is billions of years old)