Scientists are debating whether all the water on Earth has been excreted by animals at some point.

Scientists Neil Donahue and David Kreamer offer contrasting perspectives on whether all water on Earth has been part of animal waste.

Scientists disagree on whether all water on Earth has been "peed" before due to differing approaches to the question and assumptions about the water cycle and biological contributions.

Experts have differing opinions on whether all the water on Earth has been peed before, with some suggesting yes based on calculations of animal waste over geological time, and others arguing no due to water trapped as glacial ice, deep groundwater, and 'juvenile water' from inside the Earth.

Neil Donahue suggests that based on calculations, even mammals have probably peed more than an ocean since they took over, indicating that all water on Earth might have been peed before.

Scientists disagree on whether all water on Earth has been peed before, with Neil Donahue of Carnegie Mellon University suggesting yes based on calculations, while David Kreamer of the University of Nevada, Las Vegas, argues no due to factors like trapped glacial ice and "juvenile water."

Scientists disagree on whether all of Earth's water has been urinated by animals, with one calculation suggesting it has within 19 million years, while another points to water that has never entered the cycle.

Scientists offer differing perspectives on whether all the Earth's water has been urinated by animals, with one suggesting 'emphatically yes' based on calculations, while another argues 'no' due to factors like trapped glacial ice, deep groundwater, and juvenile water.

Scientists explored whether all water on Earth has been excreted by animals, with opinions differing based on assumptions about water cycling and the existence of 'juvenile water.'

Scientists offer differing perspectives on whether all water on Earth has been excreted by animals at some point.

Experts have differing opinions on whether all the water on Earth has been peed before, with some calculations suggesting it's possible over geological timescales, while others point to water sources that have never entered the biological water cycle.

Scientists offer differing perspectives on whether all water on Earth has been part of an animal's urine, with some calculations suggesting it's possible over long timescales, while others point to 'juvenile water' that has never entered the cycle.

Scientists offer contrasting views on whether all the water on Earth has been previously urinated by an animal.

Scientists have differing opinions on whether all the water on Earth has been peed before, with one estimating it would take 19 million years to pee out the whole ocean and another noting that juvenile water has never been part of the water cycle.