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Ballard (right) is still exploring. In July

His search for the Titanic concealed a top-secret military operation. How the iconic discovery unfolded

By Katie Hunt, CNN (CNN) — Forty years ago, in the early hours of September 1, grainy black-and-white images of a metal cylinder appeared on the video feeds in the command center of Knorr, a research vessel searching the Atlantic seafloor for the world’s most famous shipwreck: the Titanic. Members of the four-person watch team,

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A Peggy Martin rose blooms in Martin's garden in Gonzales

A mysterious rose survived Hurricane Katrina and spread throughout the US. Its origins are still unknown

By Jessica Jordan, CNN If you follow the Mississippi River to where it meets the ocean, you will be in Plaquemines, Louisiana’s southernmost parish. Known for its seafood and offshore oil and gas, Plaquemines is also where an unknown rose withstood the brutal force of Hurricane Katrina. The genesis of this climbing rose bush, which

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The ocean is getting more acidic, and it could affect sharks’ teeth

By Katie Hunt, CNN (CNN) — How will the climate crisis affect one of the ocean’s fiercest predators? New research published Wednesday has examined what might happen to sharks’ highly specialized, flesh-cutting teeth. As carbon emissions increase, the ocean is absorbing more carbon dioxide from the atmosphere, lowering pH levels and making seawater more acidic,

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New type of supernova ‘looks like nothing anyone has ever seen before,’ astronomer says

By Ashley Strickland, CNN (CNN) — Astronomers have observed what they are calling a new type of supernova, which has provided an unparalleled glimpse into what happens deep within a star just before it explodes. A study detailing the surprising discovery published Wednesday in the journal Nature. Massive stars are like celestial onions: the outermost

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A Neanderthal man at a 2024 London exhibit. Modern humans genetically diverged from the lineage that produced Neanderthals and Denisovans about 600

Humans may have had a competitive edge over our ancient relatives, study suggests

By Mindy Weisberger, CNN (CNN) — Modern humans are evolutionary survivors, thriving generation after generation while our ancient relatives died out. Now, new research into our brain chemistry suggests that an enzyme unique to Homo sapiens may have made us more efficient water seekers than our closest extinct relatives. About 600,000 years ago, modern humans

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Fossils show two types of ancient human ancestors lived at the same place and time. One was possibly an unknown species

By Ashley Strickland, CNN (CNN) — Ancient, fossilized teeth, uncovered during a decades-long archaeology project in northeastern Ethiopia, indicate that two different kinds of hominins, or human ancestors, lived in the same place between 2.6 million and 2.8 million years ago — and one of them may be a previously unknown species. The discovery provides

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