In the 12th century, the Curonians dwelt in the east Baltic region between the Rīga area in the north and Klaipėda in the south. They reached the peak of their economic, political and cultural achievements in the 11th century and the first half of the 12th century. The roots of piracy as a phenomenon have a social character. The most active period of the Curonian Vikings begins in around the mid-tenth century, and lasts until the arrival of the Germans in the 13th century. The well-organised piracy of the Curonians became dangerous to navigation on an important maritime trading route along the east Baltic coast. The Curonians attacked traders' boats, robbed coastal churches, devastated Danish and Swedish coastal areas, and even stayed for a while. In the times of the Teutonic Order, in periods of diplomatic and military conflict or trading competition, even officials did not avoid robbery at sea. The Palanga coastal population used to plunder shipwrecked boats, and went marauding in coastal waters until the middle of the 18th century.

Exploration of the underwater landscape in Lithuanian waters, in the eastern part of the Baltic Sea, allowed identification of trees stumps in growth position, peat sediments, and traces of people that were living in the now flooded landscape. The exploration has been concentrated on localisation of the former Early Holocene coasts. Based on new data about sediment layers of the Preboreal‒Atlantis I, palynological and dendrohronological analysis, identified vegetation species, and dating of wood and peat samples by radiocarbon methods the Baltic Sea water level dynamics during the stages Yoldia Sea‒Early Litorina Sea could be identified. There are traces of the eroded coasts of the Yoldia Sea at a depth of 39–43 m, which were also observed at depths of 44 and 47 m. During the Ancylus Lake transgression, the RF‐I lagoons and small lakes with the peat layer and the surrounding forests were submerged. The water level could have even risen to 10–9 m below present sea level. The water drop during the Ancylus Lake regression is evidenced by a peat layer dated to 9,150–8,520 cal BP, and similar radiocarbon dating of an oak stump. The changes of the species composition of trees are indicative of the noticeable climate changes during the period 11,410–7,900 cal BP. Litorina transgression is marked by a tree stump found at a depth of 14.5 m dated to 7,900–7,660 cal BP. The preference of the Early Holocene population to the coastal zone is evidenced by poles driven into the seabed (one was dated to 9,510–9,460 cal BP) that were detected at a depth of 11 m and the T‐shaped antler axes dated to the Early Neolithic, washed ashore from the Litorina Sea coastal Stone Age settlements.

We aimed to extract DNA and amplify PCR fragments at the mitochondrial DNA Nad7.1 locus and 11 nuclear microsatellite loci in nine circa 11,000-year-old individuals of Scots pine found at the bottom of the Baltic sea and test the genetic associations with the present-day gene pool of Scots pine in Lithuania. We followed a strict anticontamination protocol in the lab and, simultaneously with the aDNA specimens, tested DNA-free controls. The DNA was extracted by an ATMAB protocol from the ancient wood specimens sampled underwater from Scots pine stumps located circa 20–30 m deep and circa 12 km ashore in western Lithuania. As the references, we used 30 present-day Lithuanian populations of Scots pine with 25–50 individuals each. The aDNA yield was 11–41 ng/μL. The PCR amplification for the mtDNA Nad7.1 locus and the nDNA loci yielded reliable aDNA fragments for three and seven out of nine ancient pines, respectively. The electrophoresis profiles of all the PCR tested DNA-free controls contained the sizing standard only, indicating low likelihood for contamination. At the mtDNA Nad7.1 locus, all three ancient Scots pine individuals had the type A (300 bp) allele, indicating postglacial migration from the refugia in Balkan peninsula. The GENECLASS Bayesian assignment tests revealed relatively stringer and consistent genetic associations between the ancient Scots pine trees and the present-day southern Lithuanian populations (assignment probability 0.37–0.55) and several wetlands in Lithuania. Our study shows that salty sea water efficiently preserves ancient DNA in wood at the quality levels suitable for genetic testing of trees dated back as far as 11,000 years before present.

A new reconstruction of the Lateglacial – Early Holocene paleoenvironmental dynamics as a background of the habitation history in the territory of the Nemunas River Delta (NRD) was based on the geological-geomorphological, grain-size, isotope (14C), pollen and diatom data supplemented by archaeological information obtained within the framework of the project „Man and Baltic Sea in the Meso-Neolithic: Relict Coasts and Settlements Below and Above Present Sea Level. ReCoasts&People“. The existence of extended proglacial lakes formed during the onset of the Lateglacial was succeeded by a period of low water estuaries or freshwater lagoons as early as 13.8 cal kyr BP. Simultaneously, groups of the Final Palaeolithic population, representing the classic Swiderian culture, inhabited the area. As shores of the Yoldia Sea and Ancylus Lake were situated further westwards (-11 to -24 – -29 m NN), wetlands and lake systems alongside with shallow boggy basins and fluvial streams predominated in the local landscape throughout the Early Holocene. Archaeological data suggest an episodic human activity in the territory while part of the archaeological sites might have been covered by sediments during the further intervals of the Holocene. Since the Early Holocene an extended peat bogs have become an important part of the landscape here.

Archeologai konstatuoja kelis kartus tūkstantmečių bėgyje vykusius laidojimo papročių pasikeitimus ir sieja juos su ideologijų transformacijomis. Teigiama, jog deginimo papročio įsigalėjimą inicijavo aukštesniojo socialinio sluoksnio žmonės, įtakingesni ir labiau nepriklausomi nuo bendruomenės tradicijų. Ikivalstybinio laikotarpio baltų visuomenėje randame tik vieną tokį visuomenės sluoksnį – draugiją. Pirmosios draugijos apraiškos baltų visuomenėje pastebimos V-VI a. Nuo X a. prasideda antras draugijos formavimosi etapas. Ši savitai organizuota visuomenės dalis turėjo suformuoti savas ideologines nuostatas ir pretenduoti užimti išskirtinę vietą tiek gyvųjų, tiek ir mirusiųjų visuomenėje. X-XI a. Kurše vykę pasaulėžiūros pakitimai, kurių išraiška buvo deginimo papročio įsigalėjimas, buvo diktuoti visuomeninio-socialinio pobūdžio transformacijų.