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A 67-year-old told her eleven children she was "going for a hike", then hiked the Appalachian Trail alone in canvas sneakers, sleeping under a shower curtain with a 17-pound sack over one shoulder. She reached Katahdin on September 25, 1955, 146 days out and seven pairs of shoes down.
A Breakthrough Listen survey was thought to have covered about 288,000 stars catalogued by Gaia. But a new simulation of the Milky Way estimates that more than 6.18 million stars actually fell within its radio-telescope beams—millions of potential worlds too faint or distant for Gaia to catalogue reliably, yet still within range if they were transmitting strongly enough.
Sheep wool was mixed into clay soil along with alginate, a polymer taken from the cell walls of brown seaweed, and the blocks were left to air-dry rather than fired. Adding wool fibre increased compressive strength by 37 percent, and combining wool with alginate roughly doubled the soil's compressive resistance.
Planets larger than Earth but smaller than Neptune are extraordinarily common around other stars, yet our solar system has none. New solar-evolution modelling offers a dramatic possibility: the young Sun may have swallowed a rocky planet five to ten times Earth’s mass, leaving chemical and seismic fingerprints that could still be hidden inside it today.
