May 21, 2019

The Mysterious Origins of Earth's Water

“If Earth didn’t have water, it wouldn’t have life, and the universe would be sorely lacking in dank memes. But exactly how water sprung up on this planet has always been a perpetual mystery. Earth didn’t just magically appear out of the ether covered in oceans upon oceans. Water has an origin story, and scientists have never completely agreed on what that story is.

In a new paper published in the Journal of Geophysical Research: Planets, Arizona State University researchers suggest that water on Earth originated from material brought by asteroids, assisted by some leftover gas strewn about after the sun’s formation.

This is certainly far from the first time people have suggested water as we know it (and drink) it has an extraterrestrial origin. Historically, the easiest explanation has been that all of Earth’s water came from asteroids that impacted the Earth during the early days of its 4.6 billion year life. Why? Water from Earth shares the same chemical signatures as water found in asteroids—specifically, the ratio of deuterium (a heavy hydrogen isotope) to normal hydrogen. And previous experiments have shown that, in spite of all the heat and energy created by these massively powerful collisions, that water could have been preserved as it found itself on the yet-to-be-blue planet.”

Read more

JJ Editor's Daily Picks

"The biggest topic in British political circles on Monday wasn’t the country’s impending departure from the European Union. It was milkshakes..."

"I often disagree with Rep. Justin Amash, R-Mich., but I've been disturbed by the idea that he should be run out of the Republican Party just because he believes President Trump committed impeachable offenses."

"The Icelandic band Hatari, whose members are quite vocal in their animosity towards Israel, held up Palestinian flags... Madonna, likewise, had two of her performers wear Israeli and Palestinian flags on their costumes."

"To celebrate the 10-year anniversary of Quentin Tarantino's "Inglourious Basterds" premiering at the Cannes Film Festival, I turn to movie critic Roger Ebert's old review of "Raiders of the Lost Ark." (Trust me on this one.)"

"The money is already here—and has been for years. In the midst of a housing crisis, an injection of cash into the superheated real-estate market seems likely to cause an uptick in evictions and displacement."

"Parents concerned about YouTube debate whether to let their children have their own channels; some forbid it, others send them to summer camp..."

"‘I Had Completely Lost the Knack for Staying Alive..." Warmer weather brings daffodils, rhubarb at the farmer’s market — and, for some, despair."

"With his new book, Howard Stern proves that his rightful place is among the prophets and moral visionaries, not the ‘shock jocks’"

"I’m terrified of parenting in the anti-vaxxer age: Anti-vaccine propaganda isn’t just harmful to children. It threatens to erode our entire sense of community."

"...doctors are starting to think more about specific nutrients that feed tumor cells. That is, how what we eat affects how cancers grow..."

"...it represents an impressive achievement: a victory of humankind against the chaos that pervades the universe."

"If trends continue, in 20 years the majority of the world’s Jews will be living in Israel. The United States will see a continuing decline in overall numbers, with a growing observant Jewish population..."