Why Earth keeps liquid water on its surface

Earth keeps liquid water at its surface

Earth stands out from the other planets because it has large amounts of liquid water on its surface. Other worlds with thick atmospheres do not have stable surface water, while some moons may hold more liquid water than Earth’s oceans beneath kilometers of ice.

Byzantium was hard to besiege — and too valuable to abandon

Byzantium stood on the land route between Europe and Asia and the sea route between the Black Sea and the Mediterranean. Its location made it a prosperous trading city and unusually difficult to besiege, while also making it too valuable to abandon.

A difficult task can make distractions easier to ignore

A hard visual task can use most of the brain's available attention, leaving less capacity for irrelevant sights and sounds. An easy task leaves more attention free, so distracting information is more likely to get through.

Like this? There’s a whole feed of it. Replace empty scrolling with things worth knowing.

Download Hence for free

Why Earth keeps liquid water on its surface

Earth keeps liquid water at its surface

Keep exploring