 Complete the following phrase:  Several global research projects are underway to investigate the effects of the COVID-19 anthropause. For example, a recent study documented a global reduction of high-frequency seismic noise. Another study, the COVID-19 Bio-Logging Initiative, uses animal tracking data collected before, during, and after lockdown, to assess how changes in human activity levels affected the movements and behaviour of a wide range of marine, terrestrial, and avian species. In 2021, an article published in The Geographical Journal historically situated the COVID-19 anthropause amongst other anthropause events that led to significant reductions in human activity, such as the 