This paper aims to investigate the epistemic markers in TED talks. The data for the study is 100 TED talks on education. The mixed method of both the quantitative and qualitative approaches was manipulated to capture the use of the linguistic means to convey epistemic modality in terms of degrees of certainty and range of devices. The findings indicate that epistemic modality is pervasive in this genre, with approximately one-tenth of the sentences in the data being epistemically modalized by TE