Before sunrise, the jellies cluster along the saltwater lake’s western shore. Each morning around 6, when dawn brightens the eastern sky, they begin to swim toward the light. Pumping water through their bells, these jellyfish use a type of jet propulsion to follow the sunlight until they nearly reach the eastern shore—stopping just short of the shadows caused by lakeside trees.
They also are pretty harmless, so swimmers don’t have to worry about getting stung by the numerous creatures. Because they’ve been isolated to this one spot, their sting has gradually gotten weaker to the point where you would hardly feel anything, according to The Nature Conservacy.
Anyone is allowed to snorkel around in the lake, you just can’t go scuba diving.
“Swimming with literally millions of jellyfish was absolutely surreal,” the uploader writes in the caption. “A reminder that there will always be surprises out there!”
To get a running jump, the robot plans out its path, much like a human runner: As it detects an approaching obstacle, it estimates that object’s height and distance. The robot gauges the best position from which to jump, and adjusts its stride to land just short of the obstacle, before exerting enough force to push up and over. Based on the obstacle’s height, the robot then applies a certain amount of force to land safely, before resuming its initial pace.
It was able to successfully conquer hurdles up to 18-inches tall while going about 5mph.
Here’s a less threatening video of the cheetah running across some grass, but don’t be deceived by the innocent-looking prance.