Helios is a simple microkernel written in part to demonstrate the applicability of the Hare programming language to kernels. This talk briefly explains why Helios is interesting and is a teaser for a more in-depth talk in the microkernel room tomorrow. Hare is a systems programming language designed to be simple, stable, and robust. Hare uses a static type system, manual memory management, and a minimal runtime. It is well-suited to writing operating systems, system tools, compilers, networking software, and other low-level, high performance tasks. Helios uses Hare to implement a microkernel, largely inspired by seL4.