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'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine'

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

The total solar eclipse sparked a ‘false dawn chorus’ in some bird species

The April 2024 total solar eclipse caused some birds to believe that a new day had arrived, prompting them to burst into song, a new study found.