Why the kilogram was redefined: the end of the metal cylinder
For 130 years the kilogram was a platinum-iridium cylinder in a Paris vault, but measurable drift against its own copies forced…
Amelia Hart
Science
Research, discovery and the natural world — from the cosmos to the cell.
74 stories
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Peer review under strain: how science checks itself
Peer review is unpaid, overloaded and gameable, and the interesting story is the repair work now underway, from preprints and registered…
Priya Anand
How carbon dating actually works and what it cannot tell you
Radiocarbon dating measures the decay of carbon-14 in once-living material, but calibration curves, contamination and a ceiling near 50,000…
Amelia Hart
Record-breaking Artemis II crew returns to Kennedy Space Center
The Artemis II astronauts who flew around the moon earlier this year are back in Florida, reunited with their capsule and launch team. It's…
Dr. Nadia Okoro
Space Exploration in 2026: The Most Significant Year in Decades
From Moon missions to Mars ambitions and a new generation of space stations, 2026 is proving to be one of the most eventful years in…
Dr. Nadia Okoro
Longevity Science in 2026: What Actually Extends Healthy Life — and What Doesn't
The longevity industry is generating billions in supplements, therapies and tests. Here's what the science says actually extends healthy…
Dr. Nadia Okoro
The James Webb Space Telescope: What It Has Taught Us About the Universe
Since it began observing in 2022, the James Webb Space Telescope has reshaped our view of the early universe, distant galaxies and the…
Dr. Nadia Okoro
The Water Cycle: How Earth Recycles Its Water
The water cycle is the constant journey of water between the oceans, the air, and the land through evaporation, condensation…
Dr. Nadia Okoro
What Is Dark Matter? The Universe's Missing Mass
Dark matter is an invisible form of mass that appears to outweigh ordinary matter several times over. We infer it from gravity, yet it has…
Dr. Nadia Okoro