[SunkenCiv]

• Did Vikings beat Portugal to the Azores? Researchers studying animal remains say Norse explorers stepped foot on the islands HUNDREDS of years before the Portuguese [10/31/2021]
• Sedimentary DNA and molecular evidence for early human occupation of the Faroe Islands [01/02/2022]

[fruser1]

I think the rubbing revealed this:

lim_x→a f(x) = L iff ∀ ε > 0 ∃ δ > 0 s.t. 0 < |x - a| < δ ⇒ |f(x) - L| < ε