An Oregon State University study has found evidence that Indigenous groups in the Pacific Northwest were intentionally harvesting edible camas bulbs at optimal stages of the plant’s maturation as far back as 3,500 years ago. An Oregon State University study has found evidence that Indigenous groups in the Pacific Northwest were intentionally harvesting edible camas bulbs at optimal stages of the plant’s maturation as far back as 3,500 years ago. Archaeology Phys.org – latest science and technology news stories