Cosmos (category filter × )

Astronauts mix cement on ISS, pave way for future space colonies
  • For the first time ever, space cement has been successfully mixed on the International Space Station.
  • On one hand, it seems stronger than Earthly cement because of its surprisingly uniform density, caused by lack of strong gravity.
  • On the other hand, it may be weaker because it develops large air pockets, making it more porous than Earthly cement.
  • The material will be tested further.
  • This research paves the way towards finding out how to create concrete structures on the Moon and Mars.

New date for 'Late Heavy Bombardment' may change life's timeline on Earth
  • There might have been no extraordinary asteroid bombardment -- new theory questions the nature of the event and proposes new date.
  • Implications are big, as this would push back the age of hospitable Earth.
  • First hints of life appeared up to 3.9 billion years ago, so it’s unlikely that the storm happened then.
  • Also, it may have been no extraordinary storm, but just the aftermath of the chaos that occured in the young solar system.
  • Ultimately, the new theory states that Earth couldn’t suffer ocean-boiling, surface-liquifying asteroid strikes since 4.48 billion years ago.

Crab Nebula blasts Earth with highest-energy photons ever recorded
  • The Tibet AS-gamma Experiment has picked up the highest-energy light ever measured.
  • Signal measured at over 100 tera-electronvolts (TeV) is 10 times the maximum energy the Large Hadron Collider sees when smashing particles.
  • Sending the signal might be a pulsar, the core of a post-supernova star, deep inside the Crab Nebula.
  • In total, 24 events greater than 100 TeV were picked up, the most powerful reached 450 TeV.
  • The next challenge for astronomers will be finding signals stronger than 1,000 TeV.

Study suggests frozen Earthlike planets could support life
  • Discovery of warm temperature zones on ‘snowball’ planets suggests that they might have areas with life on them.
  • They are the second type of planets, next to warm and temperate ones like Earth, which float around in the habitable zones of galaxies.
  • Earth might have gone through up to three snowball phases in the past, too.
  • Planets become snowballs when atmospheric carbon dioxide levels drop too low, but some were found to have areas warm enough for liquid water and life.
  • The border between a habitable and uninhabitable planet might not be as definite as geologists once thought.

Pair of supermassive black holes discovered on a collision course
  • 2 supermassive black holes, 2.5 billion light-years from Earth, might help solve a long-standing mystery - the final parsec problem.
  • As their galaxies are merging, gas and stars pass between the black holes, stealing energy - which stops when they get close enough.
  • Theory suggests that they stall at ~1 parsec (~3.2 light-years) apart; it’s unknown how often galaxies merge and if the holes really merge (or ‘waltz’ around each other).
  • During the collision, black holes emit powerful gravitational waves - this pair won’t for 2.5 billion years, but it still helps astronomers find others that emit them.
  • It is predicted there may be ~112 supermassive black holes emitting gravitational waves nearby, which might be detected in the next 5 years.




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  • Cosmos Cosmos (21) Astronauts mix cement on ISS, pave way for future space colonies
  • History History (14) Humans survived off rodents in the mountains during the last ice age, study says
  • Society Society (53) Association of Parental Incarceration With Psychiatric and Functional Outcomes of Young Adults
  • Medicine Medicine (40) Periodontitis Bacteria Love Colon and Dirt Microbes
  • Technology Technology (47) Artificial leaf produces first drugs using sunlight
  • Nature Nature (37) We can tell where a whale has travelled from the themes in its song