Brother Guy Consolmagno, S.J., and Father Paul Mueller, S.J., are planetary scientists for the Vatican Observatory based at the pope's summer residence in Castel Gandolfo, Italy.

After the assassination of Martin Luther King Jr., James H. Cone denounced the lukewarm responses of mainline Protestant and Catholic Christians to the plight of black Americans.

Cardinal Joseph Ratzinger responds to a 2001 America article by Cardinal Walter Kasper on the relationship between the universal church and local churches.

Fr. James Martin, S.J., writes "desire is a key way that God speaks to us, whether in Advent or the rest of the year."

How a new generation of theologians is reshaping the church.

The diaries of Yves Congar, the single most important theologian of Vatican II.