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The rocks were found in May 2020 in the Erg Chech sand sea, in the Sahara Desert in southern Algeria.

The shells can literally sharpen themselves, making them effective at striking tanks. But they come with environmental and health concerns.

Canberra, Aug 30 (The Conversation) In May 2020, some unusual rocks containing distinctive greenish crystals were found in the Erg Chech sand sea, a dune-filled region of the Sahara Desert in southern Algeria.

(Bloomberg) -- In a remote, dusty corner of New Mexico, so near to the Texas border that if you wander too close your smartphone changes time zones, sits a pristine factory that is the best chance for the US to wean itself off an addiction that few knew it had: uranium enriched in Russia.Most Read from BloombergHuawei Is Building a Secret Network for Chips, Trade Group WarnsGoldman Is Cracking Down on Employees That Aren't in Office Five Days a WeekMusk Told Pentagon He Spoke to Putin Directly,

Quantifying the timescale of sedimentary processes in river basins, such as erosion, transport and deposition, and their relationships with geomorphic parameters is important in the context of ongoing climate change. In this study, we combine uranium activity ratios (234U/238U) for fine-grained (<63 >μm) fluvial sediments from the Var River basin (Southern French Alps) and inferred sediment residence times, to catchment-scale spatial analysis of geomorphic parameters with the aim to investigate the factors that influence the timescale of hillslope storage and alluvial transport. Our res...