New Study Challenges Comets as Earth's Life Seeders

• A new study challenges the theory that comets delivered organic molecules to Earth.
• Comets hit Earth too fast and steep to deliver fragile organic molecules, according to the study.
• Researchers used computer simulations to model comet strikes and interactions with Earth's atmosphere.
• The study was led by a team from the University of Cambridge.
• The findings suggest an alternative origin for Earth's organic molecules.