For the first time, scientists have identified cells in mice that are capable of regenerating new hair follicles when transplanted into the skin. The finding is likely to spur research into new hair loss treatments for humans.
The mystery of migrating monarch butterflies has captured the attention. of people throughout the world. East of the continental divide in North. America, monarchs generally migrate to central Mexico from as far away as. Ontario, Canada. Monarchs west of the divide fly to the coast of California. to spend the winter. They cluster together on tree limbs during the winter. months in California by the thousands, and in Central Mexico by the mil-. lions.
The researchers carried out genome sequences on 92 monarch butterflies from around the world including non-migratory ones as well as on nine butterflies from closely related species. To study the genetic basis for migration, they compared the genetic blueprint of migratory monarchs to those that do not migrate.