They would also like to push other stem-cell types, such as those found in the intestine, to the limit in their embryo experiments.

ECONOMIST: Stem cells

President Barack Obama and some members of Congress continue to push for new legislation to stem gun violence.

CNN: Gun checks top two million for fourth-straight month

His decision here seems to stem more from a desire to push the medium, and it begs the question of why he chose to experiment with such a high profile and beloved title.

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