What were the common uses of glass?

Apr 27, 2023 ... Around 20 million years later, a small group called the placozoa breaks away from the rest of the Eumetazoa. Placozoa are thin plate-like ... Apr 20, 2022 ... More than a thousand photographs from the first half of the 20th century in Boulder. Here are five to start your journey into the past. And within the last 100 million years, two major heat spikes occurred: the Cretaceous Hot Greenhouse (about 92 million years ago), and the Paleocene-Eocene ... Mar 5, 2024 ... Below are a handful of images of some of the events and sights around the world in the year 1924. May 8, 2019 ... ... like the immigrant communities that came before them. Yet, the evidence indicates that immigrants today are poised to integrate in much the ... Aug 24, 2020 ... From politics and sports to fashion and transportation, some elements of life are virtually unrecognizable from the way they were 100 years ago. Mar 4, 2025 ... One hundred years ago, Alabama was a bustling state. Its economy was largely based on agriculture but the steel industry was booming and ... ... like 100 years ago. While beautiful black-and-white period photographs of the fort exist, information on the layout of the fort was scant until students ... Dec 30, 2024 ... A group of deep thinkers dared to imagine what life would be like in 2025. Some of their prophecies were completely off target, while others proved to be ... Jan 12, 2023 ... A fascinating insight into what Midwestern rural life was like 100 years ago, as well as how life has changed over the last 100 years.