AUTHOR=Slater Mel TITLE=Grand Challenges in Virtual Environments JOURNAL=Frontiers in Robotics and AI VOLUME=1 YEAR=2014 URL=https://www.frontiersin.org/journals/robotics-and-ai/articles/10.3389/frobt.2014.00003 DOI=10.3389/frobt.2014.00003 ISSN=2296-9144