Complex sentence: Loftus feels that today's world is for science is a perilous one and if scientists want to preserve their freedoms they need to speak out "against even the most cherished beliefs that reflect unsubstantiated myths".
Split into simpler sentences: Loftus feels that today's world is for science is a perilous one. If scientists want to preserve their freedoms they need to speak out "against even the most cherished beliefs that reflect unsubstantiated myths".