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.
There are 108 native Asclepias species in North Americaâso wherever you live along the migration routes, there are native species you can substitute for A. curassavica in a monarch garden. For lists of Asclepias species native to each region of the U.S., visit http://plants.usda.gov/java/profile?symbol=ASCLE.hile other butterflies, including others in the Danainae family (the milkweed butterflies), migrate, the monarch is the only butterfly species in the world to undertake a long-distance roundtrip migration.