Dark-rimmed ‘leopard spots’ in a rock studied by the rover last year could be the remains of Martian microbial activity, researchers said at a conference today. The announcement comes loaded ...

and a reset of expectations for US artificial intelligence companies. With no near-term relief in sight for many of the key risks facing stocks, some Wall Street firms have been giving clients a ...

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The researchers aim to develop durable materials for the inner lining of fusion reactors that can withstand extreme conditions and last throughout a power plant’s lifetime.