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Did Algae Eat All the Silica in the World’s Oceans?

Silicon is a crucial nutrient that can join with the element oxygen to form a substance commonly called silica. Silica, commonly known as glass, is found in rocks in the Earth’s crust and dissolves into the oceans, where organisms like algae and sponges use it to build their glassy skeletons. This process, called biosilicification, is extremely important in the silica cycle. Over time, organisms h

Learning with Skill-based Robot Systems : Combining Planning & Knowledge Representation with Reinforcement Learning

The usage of robots in industry is transforming. Traditionally, robots have been deployed to automate monotonous tasks through manual programming, excelling in speed and precision yet lacking flexibility. Now, as part of Industry 4.0, the paradigm is shifting towards collaborative robotics, where robots are expected to interact dynamically with their environment and handle non-repetitive tasks. Th

How dawn turned into dusk: Scoping and closing possible nuclear futures after the Cold War

How was the scope of nuclear weapons policy change immediately after the Cold War determined? Nuclear learning and worst-case thinking are common but not satisfactory answers. On the basis of primary sources in multiple languages, we posit that a particular temporalization of nuclear events in the beginning of the 1990s took place: nonproliferation timescaping. The Iraqi case of opaque proliferati