After taking a closer look at fossils kept in London's Natural History Museum, researchers have identified them as belonging to the largest known giraffe – which may also be the largest ruminant-class animal in history.
After analyzing a fossilized three-horned skull and dental remains, researchers have classified Xenokeryx amidalae as an ancient species is actually a distant relative of modern giraffes.
Animals with four-chambered stomachs that process plants are known as ruminants. Some of them, like cows, produce quite a bit of methane as they process the food. Kangaroos have been thought to produce much less. A recent study from University of Zurich says kangaroos are more gassy than we thought, but has learnings for cows on the planet.