However, theories supported by the scientific consensus have the highest level of certainty of any scientific knowledge; for example, that all objects are subject to gravity or that life on Earth evolved from a common ancestor.
然而，科学界一致支持的理论，在科学知识中具有最高级别的确定性；例如，所有物体都会受到引力，或地球上的所有生命都是从一个最后共同祖先进化而来的。