Any literature reviews out there that examine this topic specifically? Looking for a study similar to the one that examines the consensus of man made climate change amongst climate scientists, for example. Thanks!
If you're asking about Vikings versus other groups purported to have reached the Americas (that is, Africans who influenced the Olmec civilization, or Zheng He's armada, etc.) the consensus is pretty clear that only the Norse actually traveled to North America. We have an FAQ section on this.