Articles written for the GLP list the source as Genetic Literacy Project. All other articles were written for the sources noted with excerpts provided by the GLP.
vikingsthree entering greenland

How extensively did the Vikings explore the Americas a millennium ago?

Aeon | 
Around the year 1000, Leif Erikson set sail from Greenland and landed first in ‘Stone-slab land’, then ‘Forest land’ and ...