13/10/2021

Image: Tethered satellites for propulsion without fuel

How to propel a spacecraft without propellant? Use electrodynamic tethers. These are long, strong conductors connecting two spacecraft. When direct current is applied to the tether, the tether exerts a force on the spacecraft, ...

Fewer frogs died by vehicles in the outset of the pandemic

Fewer frogs died from vehicle collisions in spring 2020, when the COVID-19 pandemic began, than during the season in other recent years, according to a new study led by a University of Maine graduate student and community ...

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