Relative motion / inertial reference frames. The drone is stationary relative to the car (its velocity relative to the car is zero), while both the car and the drone move at 50 km/h relative to the ground. In the car’s inertial frame the drone simply hovers. In the ground frame it shares the car’s velocity by inertia (Galilean relativity).
BUILT BY ANIMALS — Part 1: Termites
A termite may be only about 0.3 in (0.8 cm) long, yet some species can build mounds reaching 19.7 ft (6 m)—roughly 750 times their body length.
At the same proportion, a 5 ft 9 in (1.75 m) human would construct a tower about 4,300 ft (1.3 km) tall.
Built without a central architect or blueprint, termite mounds use networks of chambers and passages to help regulate airflow and conditions inside the colony.
#BuiltByAnimals #AnimalArchitects