Eric Walker added Humans used tobacco 12,300 years ago, new discovery suggests - BBC News to Native Americans, Nicotiana and Archaic humans

Eric Walker added Nicotiana - Wikipedia to Nicotiana and Nicotiana tabacum

Eric Walker added Nicotiana - Wikipedia to Nicotiana tabacum, and added Nicotiana tabacum to Nicotiana

Eric Walker added Nicotiana tabacum and Humans used tobacco 12,300 years ago, new discovery suggests - BBC News and Nicotiana - Wikipedia to Nicotiana, and added Nicotiana to Nicotianoideae

Eric Walker added Nicotiana and Nicotianoideae - Wikipedia to Nicotianoideae, and added Nicotianoideae to Solanaceae