During the Thirty Years’ War, military enterprisers included such figures as Ernst von Mansfeld, who raised an army for the elector palatine, and Albrecht von Wallenstein, who offered his services to Ferdinand II, the Holy Roman emperor.
The researchers believe the mantas are using nature's cues such as changes in magnetic field strength, oxygen concentration, temperature and light to navigate themselves onto the right path for the next days' travel.
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New Atlas,
New Atlas,
15 Oct. 2025
The mantas are still spotted in May and October, but in fewer numbers.
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