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Subtle rotations in ancient light: Decoding the universe's symmetry

Phys.org 

A team of researchers studying the uncertainties associated with a phenomenon known as cosmic birefringence has developed a method to reduce uncertainties in its observational measurements, according to a new study published in Physical Review Letters on January 27. The study is the first to quantitatively address the uncertainty surrounding the birefringence angle, which is a crucial observational quantity that could provide clues to unknown physical theories breaking the universe's left-right symmetry... Читать дальше...

A possible ice-cold Earth discovered in the archives of the retired Kepler Space Telescope

Phys.org 

Scientists continue to mine data gathered by NASA's Kepler Space Telescope, retired in 2018, and continue to turn up surprises. A new paper reveals the latest: a possible rocky planet slightly larger than Earth, orbiting a sun-like star about 146 light-years away. The candidate planet, HD 137010 b, might be remarkably similar to Earth, but it has one potentially big difference: It could be colder than perpetually frozen Mars.

Great white sharks grow a whole new kind of tooth for slicing bone as they age

Phys.org 

A great white shark is a masterwork of evolutionary engineering. These beautiful predators glide effortlessly through the water, each slow, deliberate sweep of the powerful tail driving a body specialized for stealth, speed and efficiency. From above, its dark back blends into the deep blue water, while from below its pale belly disappears into the sunlit surface.