Tina Hesman Saey's Articles
- All tribes seem to derive from the same Asian roots, DNA indicates.
- Polar animals are encountering new, killer parasites as melting ice unlocks their access to new hosts.
- Genes from an ancient skeleton suggest that dark-skinned people may have been the first to evolve blue eyes.
- A trio of scientists who studied how cells transport materials — think of buses moving kids to and from school — will share a 2013 Nobel Prize.