Two chemical tracers in carbonaceous iron meteorites indicate that the earliest outer Solar System planetesimals contained only 8 to 17 perc…
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During the Solar System’s first million years, its earliest outer worlds formed from material that was up to 92 percent heat-forged rock, while gas flowing through the young system filtered out much of the surrounding ice-rich dust.
Science
NASA budgeted 200 kilograms of fuel for Roman’s first course correction, but the telescope used only 18. Combined with extra fuel loaded before launch and further expected savings, that could stretch its 10-year fuel plan to at least 22 years.
Roman's first correction used nine percent of its 200-kilogram allocation. NASA now projects enough propellant for at least 22 years, while …
Science
In 1971, scientists moved just five pairs of Italian wall lizards onto a small Croatian island; 36 years later their descendants had larger heads, stronger bites and altered digestive tracts suited to eating far more vegetation than the original population
Ten lizards went to a Croatian island in 1971, and nobody came back to check on them for thirty-six years. They were Italian wall lizards, P…
Science
On 2 August 1971, near the end of Apollo 15’s final moonwalk, David Scott stood before a television camera holding a 1.32-kilogram geological hammer in one hand and a 30-gram falcon feather in the other. He released them together, and in the Moon’s near-vacuum they struck the dust simultaneously—dramatically demonstrating what Galileo had predicted nearly four centuries earlier.
Apollo 15 turned a geological tool and a falcon feather into a televised demonstration of equal gravitational acceleration in the Moon’s nea…
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