If you use consumer AI systems, you have likely experienced something like AI "brain fog": You are well into a conversation ...

2025 was the third hottest year on record, but thousands of cities saw record heat and one broke a record for cold. By Harry Stevens and Eric Niiler Last year was Earth’s third hottest globally, but ...

Pupil dilation provides a physiological readout of information gain during the brain's internal process of belief updating in the context of associative learning.