A new technique using time-delay cosmography might finally resolve the biggest tension in modern physics
Sandeep K S
Dec 7, 2025
1 min read
This infographic illustrates the cosmic mystery of differing universe expansion rates, with measurements from cosmic microwave background (67 km/s/Mpc) and supernova observations (73 km/s/Mpc). It introduces time-delay cosmography, using galaxy lenses and quasars, as a new method suggesting the universe's expansion aligns with the higher rate, emphasizing potential gaps in our understanding of the cosmos.
Just a few days in simulated microgravity can subtly change the way women's blood clots, sparking bigger questions about health monitoring protocols for astronauts who spend six months or more in orbit.
First reported in 2020, an International Space Station (ISS) mission detected an unexpected blood clot in a female astronaut's jugular vein.
For the first time, scientists have successfully measured magnetohydrodynamic (MHD) turbulence on scales below one parsec within the gamma-ray halo surrounding the Geminga pulsar wind nebula.
Published in Science Advances, this groundbreaking observation extends to the highest energies—above 100 tera-electron volts (TeV)—providing entirely new insights into the behavior of cosmic rays and magnetic fields within the Milky Way.
It is one of the most famous questions in science, asked over lunch by physicist Enrico Fermi. With hundreds of billions of stars and billions of years, life should have emerged many times over. And yet, no signals. No visitors. No evidence of anyone at all.
The universe is 13 billion years old. Our galaxy alone contains hundreds of billions of stars, a significant proportion of which host planets. Many of those planets sit in the right temperature range for liquid water.
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