(Since the history segment is no longer bound to the number of the episode, I will take a break from Roman politics today.~David Verne)
The Amazing Properties of Roman Concrete
Contributed by David Verne
The Romans were very advanced for their time. Many of the construction projects that they completed are still breathtaking today, especially because of their durability. One of their most impressive construction projects were the breakwaters used in the harbors. While breakwaters made out of modern concrete break apart after 40-50 years of exposure to seawater, the walls built 2,000 years ago by the Romans are still somewhat intact. The key lies in the type of concrete they used. The Romans used a mixture of lime, volcanic ash, and seawater, then mixed with pieces of volcanic rock to make their concrete. This mixture was then poured into wooden molds to set, which could be done underwater, and nothing like rebar was used. Recent core samples of ruined breakwaters taken by researchers, found that the concrete actually became stronger when exposed to seawater instead of weaker. The sea had washed away parts of the volcanic ash allowing a chemical reaction to take place between the seawater and a mineral in the volcanic rocks called philipsite creating interlocking mineral growths in the cracks. The mineral crystals found in the concrete are an extremely rare mineral called aluminous tobermorite (Al-tobermorite). Al-tobermorite is extremely difficult to make in a lab and only produces small quantities. The Romans also boast the world's largest unreinforced concrete dome. The Pantheon, built in 126 AD, has a dome with a diameter of 142ft and is one of the most well preserved Roman buildings.  
Masurius Sabinus Publishes Treatise on Civil Law
Contributed by Southpaw Ben.
This year Sabinus publishes his 3 volume treatise on civil law. While his works were lost to history, later jurists will write commentaries about them, but unfortunately didn't inclue excerpts from his original works. He helped found one of the twom most inportant schools of Law in room during the first and second centuries, known as the Sabinian school. Marsius was also the first person to give publice respondere, which meant a state crtified opinion, a privlege granted by the emperor. This new "privilege" marked an increase in the amount of imperial control over the judicial process in this period of flux that marks the end of the Roman Republic and the start of the empire. Prior to this privilege, the value of legal opinions rested solely on the expertise of those who gave them.
- Ahmad, Zahra (July 3, 2017). Why modern mortar crumbles, but Roman concrete lasts millenia. American Association for the Advancement of Science.
- New studies of ancient concrete could teach us to do as the Romans did. Phys.org (July 3, 2017).