These 5 biomedical advances gave 2022 a sci-fi feel
Big steps include pig to human organ transplants and synthetic embryos
![a natural embryo and a synthetic embryo against a black background](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/12/121722_medicine_synthetic-embryos_feat.jpg?fit=1030%2C580&ssl=1)
A natural mouse embryo (top) and synthetic mouse embryo (bottom) at about eight days of development show similar brain formation (bright pink and orange represent different regions in the brain).
Amadei and Handford