Theory of animal extinction, suggesting that a companion star to the Sun caused the extinction of dinosaurs and other groups of animals.
However, many palaeontologists deny any evidence for a 26-million-year cycle of extinctions. Also, detailed infrared surveys of the Solar System and its immediate neighborhood, including the NASA mission WISE (2009–11), have failed to detect such an object, making it extremely unlikely that it exists.
Theory of animal extinction, suggesting that a companion star to the Sun caused the extinction of dinosaurs and other groups of animals. However, many palaeontologists deny any evidence for a 26-million-year cycle of extinctions. Also, detailed infrared surveys of the Solar System and its immediate neighborhood, including the NASA mission WISE (2009–11), have failed to detect such an object, making it extremely unlikely that it exists.