In 2024, researchers finally captured high-speed footage of hippos running at full speed. What they discovered defied basic physics: hippos become completely airborne with every single stride.
We're not talking about a tiny hop. These 4,000-pound animals spend 15% of their stride cycle—about 0.3 seconds—with all four feet completely off the ground. They're literally flying through the air multiple times with every step they take.
Think about what this means. An animal that weighs as much as a small car is launching itself into the air repeatedly while running. The force required to get that much mass airborne is absolutely insane.
Before this research, scientists assumed hippos were too heavy for this kind of movement. Every biology textbook said animals over a certain weight couldn't achieve a "suspended phase" in their gait. Hippos just proved that completely wrong.
The researchers used high-speed cameras and motion analysis to track hippos at the Flamingo Land theme park in the UK. They had to film at extremely high frame rates because hippos move so fast that the airborne phase happens in a fraction of a second.
Here's what makes it even more remarkable: hippos can reach speeds of up to 30 mph on land. That means they're repeatedly launching two tons of muscle and fat into the air while moving faster than most humans can sprint.
The discovery changes how we understand animal locomotion entirely. If hippos can achieve flight phases, what other massive animals are doing things we thought were physically impossible?
The study also revealed that hippos only gallop when they're on land. In water, they use a completely different movement pattern—basically bouncing along the bottom rather than swimming. So they're not just flying on land, they're also refusing to swim like normal animals in water.
The most unsettling part? Hippos are one of the most dangerous animals in Africa, killing an estimated 500 people per year. Now we know they can also chase you while briefly achieving flight. Sleep well tonight!