4+ day, 23+ hour ago  (276+ words) The Norse colonies in Greenland were marginal at best. The distance from Greenland to Vinland alone was over 2,500 kilometers, making it a daunting journey even for these seasoned sailors. The logistical challenges of maintaining a settlement so far from their…...

1+ mon, 3+ week ago  (566+ words) The Y chromosome was the hardest to sequence because its DNA is packed with long repetitive stretches, called satellite DNA, and palindromes that short-read technology could not read accurately. It was finally completed in August 2023, when the T2T consortium published the…...