Articles on Iron

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Phytoplankton blooms, seen by satellite in the Baltic Sea, pull carbon dioxide out of the atmosphere. European Space Agency via Flickr

Climate engineering would alter the oceans, reshaping marine life – new study examines each method’s risks

Some methods being tried to counter climate change shift the ocean’s biology or chemistry. Others would deflect solar radiation. All have consequences for marine life.
An official from German energy supplier Eon with Fortescue founder Andrew Forrest after inking a deal in 2022 to supply green hydrogen from Australia to Germany. Michael Kappeler/picture alliance via Getty Images

What’s happened to Australia’s green hydrogen dream? Here are 5 reasons the industry has floundered

Several big green hydrogen projects have been shelved. An expert explains why Australia’s sky-high ambition for the industry is struggling to reach fruition.
Ostrich eggshell beads found at Thulamela tell a lot about ancient production strategies, value systems and trade. Author supplied

South Africa’s history uncovered: the 1,000‑year gap they don’t teach in school

Between the 10th and 15th centuries, the gold market boomed, especially in Egypt, Persia, India and China. Southern Africa played a crucial role in meeting demand.
Iron carries oxygen throughout the body, but ironically, it can also make it harder to breathe for people with asthma. Hiroshi Watanabe/Stone via Getty Images

Iron fuels immune cells – and it could make asthma worse

Asthma attacks can result from immune cells overreacting to a harmless allergen. Tamping down iron levels in certain immune cells can help control their activity.
A large robot, loaded with sensors and cameras, designed to explore the ocean twilight zone. Marine Imaging Technologies, LLC © Woods Hole Oceanographic Institution

Scientists envision an ‘internet of the ocean,’ with sensors and autonomous vehicles that can explore the deep sea and monitor its vital signs

The ocean twilight zone could store vast amounts of carbon captured from the atmosphere, but first we need a 4D monitoring system to ensure ramping up carbon storage does no harm.

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