Hmm, not often I see the country I live in on the front page of HN.

There's a long history here of slave trade, but it's largely glossed over in the national origin myth context.

> The team then used machine learning to combine the strontium isotope data from those samples with information about elevation, soil characteristics, climate, and geological variables across Angola.

Is it machine learning or statistical inference? Or are these the same thing these days? For a country as large as Angola (twice the size of Texas for Americans), 101 botanical samples is not that many.