Radiolarians are a highly diverse group of marine protozoa widely recognized for their intricately ornate mineral skeletons. Part of the plankton community, radiolarians have a fossil record that extends back to the early Paleozoic era. Because they have undergone continuous evolutionary change, they are often used to analyze the layers of the marine sedimentary record. What German biologist produced exquisite drawings of radiolarians that helped to popularize them among Victorian microscopists?
Back in the day
The Two Plus Four Agreement, also known as the Treaty on the Final Settlement With Respect to Germany, was the final peace treaty negotiated between the Federal Republic of Germany, the German Democratic Republic, and the four powers that occupied Germany at the end of World War II: France, the UK, the US, and the Soviet Union. The treaty paved the way for the German reunification, which took place on October 3 of that year. What rights did the four powers renounce under the treaty's terms?
Born on a day like today
Owens was an African-American track-and-field star famous for his performance at the 1936 Berlin Olympic Games, where he claimed 4 gold medals in the presence of Adolf Hitler and Nazi leaders, who had hoped the games would promote their idea of racial superiority. Though hailed as a hero, Owens faced segregation upon his return to the US, even suffering the humiliation of having to use a freight elevator to attend a post-parade reception in his honor. How did he earn a living after the Olympics?