Science Alert
Catch up on the latest science news, from space and technology to life and environmental research- all the discoveries shaping our world today.
Updated: 2 hours 33 min ago
Shechtman’s 10-Fold Symmetry Note: alloy defied crystal rules; quasicrystals reshaped materials science
In 1982, materials scientist Dan Shechtman observed an unusual tenfold symmetry in an aluminum-manganese alloy, defying the established definition of crystals. Despite initial skepticism and resistance from the scientific community, his persistent research led to the discovery of quasicrystals, a new form of atomic ordering. This groundbreaking finding revolutionized crystallography and earned Shechtman the Nobel Prize in Chemistry.
Trees cut extra city heat by half, but not quite where most needed
City trees serve as essential green shields, absorbing heat and providing relief from the suffocating warmth generated by urban structures. However, the impact is starkly diminished in hotter, low-income areas where their cooling shade is desperately needed. While urban forestry globally cools cities by an average of 0.
Hidden in the dust: The 2-billion-year-old asteroid crater that holds the secret clue to ending an ice age
Scientists have identified the Yarrabubba impact crater in Western Australia as the Earth's oldest, dating back 2.229 billion years. This ancient collision, occurring when Earth was covered in ice, may have released massive amounts of water vapour, potentially ending a global ice age. The discovery offers crucial insights into early Earth's climate history.
The unmeasurable abyss: The deepest blue hole on earth has a hidden tunnel that defies science
Mexico's Taam Ja' Blue Hole has been identified as the world's deepest, plunging to an astonishing 420 meters. This remarkable natural filter, located in Chetumal Bay, presents unique research opportunities. Its isolated depths act as a time capsule, preserving ancient organic material and potentially offering insights into the Stone Age due to minimal oxygenation.
The buried secret inside South Africa’s broken rocks that revealed Earth’s biggest impact
South Africa's Vredefort crater, the Earth's largest proven meteorite impact site, defies the typical circular depression image. Formed 2 billion years ago, its immense initial size has been eroded, revealing a damaged core. This weathering, however, has made it a crucial geological site, offering a unique profile to study the crust's response to giant impacts.
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