Our universe appears flat—but this observation still leaves plenty of options for its true shape. In fact, our cosmos could resemble a donut What shape is the universe? This question is far more ...

We are providing an unedited version of this manuscript to give early access to its findings. Before final publication, the manuscript will undergo further editing. Please note there may be errors ...

A research team from northwestern China has released a new algorithm that could fundamentally change how drone swarms hunt and destroy enemy targets. The algorithm, known as HG-STR (Heterogeneous ...

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