Consciousness remains one of the biggest mysteries of the human brain. Our perception of what exists as well as our thoughts, feelings, imaginings and dreams has attempted to be understood by philosophers through conceptual analysis and thought experiments. Neuroscientists have sought to describe it as a biological process of neuronal activity captured by measurable tests of brain activity. Increasingly, philosophers and neuroscientists are joining forces, but consensus is elusive. Do we experience consciousness only while we are awake? Do other animals experience consciousness? Does it fade after brain damage? Are intelligent computers conscious? Is consciousness a process? What is it for? We have invited a neuroscientist and philosopher to share their research and perspectives on consciousness and to provide some guidance on these questions.