Latest posts
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What Surveillance for Emerging Viruses Is Trying to Do
Detecting a virus before it spreads widely is a sampling problem with a very large search space. Most work goes into deciding where to look rather than into any single technology.
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Why Groundwater Depletion Is Hard to See Until It Is Serious
Groundwater is the largest store of liquid fresh water on land, and it is being drawn down faster than it refills in many regions. The problem is that almost none of it is visible.
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What Electric Aircraft Have to Solve Before They Are Common
Electric propulsion works well in cars because weight matters less there. In aircraft, the energy source itself is the payload, and that single fact shapes every design decision.
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Why Malaria Has Proven So Difficult to Eliminate
Malaria has been controlled in some places and eliminated from others, yet it persists across large regions. The reasons are biological, logistical and economic at the same time.
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What Soil Health Actually Means and Why It Is Being Measured
Soil is often treated as an inert substrate that holds plants upright. Increasingly it is assessed as a living system whose condition can be improved or degraded.
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How Satellite Internet Constellations Work and What Limits Them
Low Earth orbit constellations turned satellites from fixed fixtures into moving nodes in a network. That change brings coverage and latency benefits, along with new physical constraints.
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How Is Sea Level Actually Measured?
Sea level is measured from space to within centimetres, and from tide gauges over more than a century. Reconciling the two is where the real work happens.
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What Does A Hydrogen Economy Actually Need?
Hydrogen can store energy and replace fossil fuels in some industrial processes, but only if production, transport and storage all work at once. Each of those is a separate unsolved problem.
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What Does Battery Recycling Actually Involve?
Recycling lithium-ion batteries is possible and increasingly necessary, but it is closer to chemical processing than to ordinary waste sorting.
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What Does Carbon Removal Actually Involve?
Removing carbon dioxide that is already in the atmosphere is far harder than reducing emissions. Durability, measurement and scale are the three things that decide whether an approach matters.