Projects on the scale of the $4.7 billion, 1.1-mile-long (1.7-kilometer-long) Grand Ethiopian Renaissance Dam often encounter impassioned resistance, but few inspire the kind of dread and fury with which most Egyptians regard plans to dam the Blue Nile River.

Egypt insists Ethiopia’s hydroelectric scheme amounts to a violation of its historic rights, a breach of the 1959 colonial-era agreement that allocated almost three-fourths of the Nile waters to Egypt, and an existential threat to a country largely devoid of alternative freshwater sources.

But what Egyptians regard as a nefarious plot by its historic adversary to control its water supply, Ethiopians see as an intense source of national pride and a symbol of their country’s renewal after the debilitating famines of the 1980s and ’90s. Read more

THERE’S EVEN MORE water on the moon than we previously thought, according to new analysis of tiny glass beads left over from ancient volcanic eruptions.

The naturally occurring beads were collected in the 1970s as part of the Apollo 15 and 17 missions, which landed near zones of volcanic activity. The beads formed when magma bursting onto the surface crystallized in such a way that water became trapped inside.

Scientists used to think the moon was completely devoid of water, but recent studies have proven that false.

However, scientists couldn’t be sure if the Apollo samples are unique or if other volcanic flows on the moon are filled with water-bearing glass. (Find out how flying oceans of magma help demystify the moon’s creation.)

In a new study published today in Nature Geoscience, scientists reexamined the Apollo samples and used more recent satellite data to look for signs of water-bearing beads elsewhere on the moon. They found that the volcanic deposits are indeed widespread, which suggests that the material inside the moon is wetter than previously thought. Read more

It was the Maltese delegate to the United Nations who spoke up first, in November 1967, to urge the members of the U.N. to use their collective clout to come to an agreement on fair and responsible use of the world’s oceans. It took 15 years, but an agreement was eventually struck from a nine-year conference that produced the U.N. Convention on the Law of the Sea.

Because of their importance in navigation, straits like the Strait of Gibraltar (shown off the coast of Tarifa, Spain) remain international waters.

The treaty was completed in 1982 and came into force in 1994. Essentially, it codified already established customs, like the Law of the Sea. International waters remained international, “the common heritage of all mankind” [source: UN]. Limitations were set on how much coastal water and seafloor a nation could claim as its own. The territorial sea, that aquatic boundary along a nation’s coast that extends its terrestrial boundaries, was set at 12 nautical miles (13.8 miles and 22.2 km).

The convention also set clear definitions for types of waters. Straits, for example, cut through two land masses (usually owned by two sovereign nations) and connect two larger bodies of water. They’re usually narrower than the 12-mile territorial sea rule. But due to their infinite value in shipping and defense, providing passageways through land masses, straits have traditionally been viewed as international water, despite their close proximity to sovereign nations’ soil. The U.N. maintained the straits’ position as international waters. Read more

The Age of Exploration quickly lent itself to an age of colonialism. Europe’s nations sailed to ancient and new lands and claimed them as extensions of their own soil. In the process, they warred with other countries for territory and committed genocide against the indigenous peoples already living there. The raw materials found in these new territories offered seemingly limitless wealth for the colonizing nations. But millennia of learning to exploit raw materials had taught Europeans that anything found on land was ultimately finite.

Want a parade held for you? Be the first person to circumnavigate the globe. A posthumous celebration was held in Spain in 1522 to honor Ferdinand Magellan’s feat.

07It took slightly longer for this perception to include the sea as well. Humans circumnavigated the globe only in A.D. 1522, but have lived on land for 195,000 years. Because of the immense size of the world’s oceans and our technological inability to remove the resources found in and below them, the idea was that we humans are incapable of depleting these resources. That idea changed in the mid-20th century.

Oil exploration and production became increasingly sophisticated, and nations moved to secure as much oil, natural gas and minerals from the oceans as they could. Since there were no formal treaties or international laws concerning oceans, there was little resistance any governments could legitimately offer to encroaching nations. The oceans, which had been everyone’s shared property for centuries, were now being carved up without any coherent pattern. Read more

Who owns the world’s oceans? It’s a legitimate question. We divvy up Earth’s terrain through war, conquest and colonization. We use rivers, mountains and entire continents to establish geographic boundaries on land. The oceans have no apparent surface features — just a flat, vast, briny expanse. They’re also all connected; the world’s five oceans are technically one single ocean that covers 71 percent of the planet.

A few of the oceans’ owners enjoy the beach in Comoros, an archipelago in the Indian Ocean

This makes it difficult to divide, and so ultimately, you own the oceans. You and the rest of the 6.6 billion people swarming over Earth’s face right now. All of us own the oceans, and yet none of us do. It’s a conundrum.

For centuries, beginning with the Age of Exploration when ships were developed that could convey humans across the globe, the governments that represent people like you, the oceans’ owner, agreed that no one owned the oceans. This informal agreement was referred to as the Freedom of the Seas doctrine. This concept is also referred to more swashbucklingly as the Law of the Sea.

The doctrine granted exclusive rights to the three-mile buffer of ocean that abutted a coastal nation’s boundaries. These waters given to coastal countries extend those nation’s terrestrial boundaries into the sea; when any foreign nation enters these waters belligerently or without permission, it’s tantamount to an invasion of sovereign soil. The remaining majority of the sea was to be shared by all nations — including landlocked ones — for trade and commerce. Since the oceans are international waters, one nation attacking another’s ship on the open sea could be construed as an act of war. Read more