Earth’s first lifeforms breathed arsenic, not oxygen

The microbes that eventually produced the planet's oxygen had to breathe something, after all.

Credit: BRONWYN GUDGEON/Shutterstock
  • We owe the Earth's oxygen to ancient microbes that photosynthesized and released it into the world's oceans.
  • A long-standing question has been: Before oxygen, what did they breathe?
  • The discovery of microbes living in a hostile early-Earth-like environment may provide the answer.
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Sharks flee in terror when killer whales show up

Sharks fear killer whales. How does this impact the ecosystems they share?

Credit: Tory Kallman/Shutterstock
  • A new study finds that sharks will flee areas they met orcas in for up to a year.
  • Killer whales are known to eat sharks, but it is unknown if the sharks are fleeing because they know that too.
  • The discovery will change our understanding of how marine ecosystems evolve.
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Megalodon’s actual size, recalculated

A new study bases its calculations on more than the great white shark.

  • Previous estimates of the megalodon's size were based solely on its teeth compared to the star of "Jaws."
  • The prehistoric monster is as closely related to other sharks.
  • Imagine just a dorsal fin as tall as you are.
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Photo by Alexandra Rose on Unsplash

Mining the ocean floor for submerged minerals is a little-known, experimental industry.

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Massive 'Darth Vader' isopod found lurking in the Indian Ocean

The father of all giant sea bugs was recently discovered off the coast of Java.

SJADE 2018
  • A new species of isopod with a resemblance to a certain Sith lord was just discovered.
  • It is the first known giant isopod from the Indian Ocean.
  • The finding extends the list of giant isopods even further.
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