# Death and Serious Injury by Dark Matter

## TL;DR

This paper explores the potential for dark matter macros to cause injury or death upon collision with humans, using the absence of unexplained impacts to constrain macro properties and proposing the human body as a dark matter detector.

## Contribution

It introduces a novel method to constrain dark matter macro parameters by analyzing human impact data and suggests the human body can serve as a dark matter detector.

## Key findings

- Excluded macro cross-sections above 10^{-8} - 10^{-7} cm^2 for masses below 50 kg
- Demonstrated the human body can be used to detect or constrain dark matter macros
- Identified a new parameter space for dark matter based on collision effects with humans

## Abstract

Macroscopic dark matter refers to a variety of dark matter candidates that would be expected to (elastically) scatter off of ordinary matter with a large geometric cross-section. A wide range of macro masses $M_X$ and cross-sections $\sigma_X$ remain unprobed. We show that over a wide region within the unexplored parameter space, collisions of a macro with a human body would result in serious injury or death. We use the absence of such unexplained impacts with a well-monitored subset of the human population to exclude a region bounded by $\sigma_X \geq 10^{-8} - 10^{-7}$ cm$^2$ and $M_X < 50$ kg. Our results open a new window on dark matter: the human body as a dark matter detector.