On the website of the Werner-Gren-Foundation, which welcomed Teilhard for the last years of his life, in New-York, you can find two audio recordings of conferences he gave there… Follow these links to listen to it… in English! 

– The first one dates from April 8, 1948. It is about “The meaning and tendencies of human socialization” – Duration: 37 mn. Click here
– The second one dates from March 14, 1952 and concerns “New advances in prehistory in South Africa “. Duration: 1 h – Teilhard intervenes from 4mn38s. Click here