"An extraordinary number of arrows dating from the Stone Age to the medieval period have melted out of a single ice patch in Norway in recent years because of climate change.
Researchers from the Universities of Cambridge, Oslo and Bergen gathered up a total of 68 arrow shafts, some with arrow heads still attached or nearby, and many other artefacts. Almost all of the items were found on an area of mountainside no bigger than 18 hectares in Jotunheimen, a region of southern Norway.
The oldest arrows date from around 4100 BC while the youngest are from roughly AD 1300, based on radiocarbon analysis. However, the dates aren’t evenly distributed across the millennia, raising questions about whether environmental conditions during some periods were more likely to preserve fallen arrows than at other times. Peaks and troughs in reindeer hunting activity could also have played a role.
In some cases, arrowheads of various materials have also survived, including bone, slate, iron, quartzite and one made of mussel shell. A few arrowheads even retain the twine and tar used to fix them to their wooden shaft."
https://www.newscientist.com/article/2260700-climate-change-has-revealed-a-huge-...So it must have been warmer than today on at least one occasion. And yet according to the guardians of global warming CO2 hsn't been anywhere near our present level in the past.
"It started with an 1,800-year-old shirt. Archaeologist Lars Holger Pilø had watched his colleagues discover the ancient wool tunic that had emerged from a melting ice patch on Lomseggen, a mountain in southern Norway. Now Pilø wondered what else was out there. As the rest of the team packed up the precious find, he and another archaeologist wandered away from the group, tracing the edge of the melting ice shrouded in mountain fog.
As he peered into the gloom, Pilø soon realized he was looking at a field of objects that hadn’t seen the light of day for hundreds of years. Broken sleds, tools, and other traces of daily life going back nearly 2,000 years lay strewn across the surface of the Lendbreen ice patch, which was melting rapidly due to global warming."
https://www.nationalgeographic.com/history/2020/04/lost-viking-highway-revealed-..."Scientists report they have discovered perfectly preserved, 800-year-old penguin remains exposed by a patch of melting ice along the Antarctic coast. The news media and climate activists are touting this as proof of an unprecedented climate crisis. In reality, the discovery reveals that temperatures in the not-too-distant past were as warm or warmer than present temperatures.
Reporting in the peer-reviewed journal Geology, scientists encountered what appeared to be the fresh remains of Adelie penguins in a region where penguins are not known to live. Carbon dating showed the penguin remains were approximately 800 years old, implying the remains had very recently been exposed by thawing ice. Further examination and testing of the site showed that penguins had colonized and abandoned the site multiple times between 800 and 5,000 years ago.
The scientists noted that the most recent period of penguin colonization began at the beginning of the Medieval Warm Period (approximately 900 A.D.) and ended at the beginning of the Little Ice Age (approximately 1200 A.D.). The scientists noted that penguins currently cannot live in the region because “fast ice” (ice that extends from the Antarctic shore many miles out into the ocean) prevents penguins from accessing the ocean from shore. During the warmth of the Medieval Warm Period, the absence of fast ice allowed penguins to colonize the area.
Further analysis of the site showed penguins were able to live and breed in the region during most of the past 5,000 years. The scientists described the period of greatest colonization as the “Penguin Optimum,” lasting from 2,000 B.C. to the time of Christ. Presumably, it was too warm for fast ice to extend from the Antarctic coast during these periods of penguin colonization."
https://climaterealism.com/2020/10/antarctic-penguin-remains-show-present-temper...