[Report] Large wind ripples on Mars: A record of atmospheric evolution

Science

Wind blowing over sand on Earth produces decimeter-wavelength ripples and hundred-meter– to kilometer-wavelength dunes: bedforms of two distinct size modes. Observations from the Mars Science Laboratory Curiosity rover and the Mars Reconnaissance Orbiter reveal that Mars hosts a third stable wind-driven bedform, with meter-scale wavelengths. These bedforms are spatially uniform in size and typically have asymmetric profiles with angle-of-repose lee slopes and sinuous crest lines, making them unlike terrestrial wind ripples. Rather, these structures resemble fluid-drag ripples, which on Earth include water-worked current ripples, but on Mars instead form by wind because of the higher kinematic viscosity of the low-density atmosphere. A reevaluation of the wind-deposited strata in the Burns formation (about 3.7 billion years old or younger) identifies potential wind-drag ripple stratification formed under a thin atmosphere.


The strange dunes on Mars: Scientists discover ripples on planet's surface that could provide a window into its past

Daily Mail - Science & tech

The desolate land that covers our neighbouring planet, giving it its unmistakeable red hue, has continued to surprise researchers since they began investigating Mars' surface. Now the red planet has revealed another surprise, which could provide scientist with clues into the history of the world. Researchers have discovered a new type of dune on Mars that look similar to those that form underwater on Earth. Researchers have discovered a new type of dune on Mars, and it is unlike anything seen on Earth. These ripples are different in terms of size, morphology, and the way they form, from any other known.


Manager of Ripple cryptocurrency exchange arrested for scam

The Japan Times

A Japanese manager of an exchange for the Ripple cryptocurrency was arrested Wednesday for allegedly swindling ¥1.4 million ($12,470) from a depositor, police said.



Ripple co-founder: Cryptocurrency needs a decentralized network to be successful

#artificialintelligence

Cryptocurrency and the underlying blockchain technology need a decentralized network in order to be successful long term, said Ripple co-founder Jed McCaleb. Use of a centralized financial payment network will result in "a system that is no better than SWIFT or PayPal," McCaleb said. "The real vision is that you have a network, much like the internet, that anyone can participate in," McCaleb said Friday on CNBC's "Fast Money." "There's not one central entity that can decide that it's going to start charging. This is the way this thing can actually grow and reach ubiquity."