This issue opens an inquiry into the tension between solidity and fluidity. This tension is ingrained in the Western intellectual tradition and informs theoretical debates across the sciences and humanities. In physics, solid is one phase of matter, alongside liquid, gas and plasma. This, however, assumes all matter to be particulate. Reversing the relation between statics and dynamics, we argue to the contrary, that matter exists as continuous flux. It is both solid and fluid. What difference would it make were we to start from our inescapable participation in a world of solid fluids? Is solid fluidity a condition of being in the midst of things, or of intermediacy on a solid-fluid continuum? Does the world appear fluid in the process of its formation, but solid when you look back on things already formed? Here we open new paths for theorizing matter and meaning at a time of ecological crisis.

这个问题开启了对坚固性和流动性之间张力的探究。这种张力在西方知识传统中根深蒂固，并影响着科学和人文学科的理论辩论。在物理学中，固体是物质的一个相，与液体、气体和等离子体并列。然而，这假设所有物质都是微粒。颠倒静力学和动力学之间的关系，我们反其道而行之，物质以连续流动的形式存在。它既是固体又是流体。如果我们从不可避免地参与固体流体世界开始，会有什么不同？固体流动性是处于事物中间的状态，还是处于固体-流体连续体的中间状态？世界在其形成过程中是否看起来是流动的，但是当你回顾已经形成的事物时，它是稳固的吗？在这里，我们开辟了在生态危机时期将物质和意义理论化的新途径。