An ‘Orbital Gateway’ Can Guide Comets to the Inner Solar System

Posted on Categories Discover Magazine

Centaur Schwassmann-Wachmann 1 has a chance to get funneled into the inner solar system in the not-so-distant future. This artist's concept shows what the comet would look like if it were 0.2 AU (19 million miles, 30 million kilometers) from Earth. Note the Moon at upper right for scale. (Credit: University of Arizona/Heather Roper) Astronomers have discovered an orbital region just beyond Jupiter that appears to act as a kind of gateway for some objects entering the inner solar system from ...read more

These Bacteria-Powered Robots May One Day Swim Through Your Bloodstream

Posted on Categories Discover Magazine

The bacterium Escherichia coli, illustrated here, moves itself with propeller-like structures called flagella; it is one of the mobile microbes scientists have linked to cargo-carrying structures to form biohybrid microrobots. (Credit: supergalactic/Shutterstock) In the universe of TV's Doctor Who, the scariest adversaries of all are the hybrid robot-organic life-forms known as the Daleks. Each Dalek is a living being encased in a robotic shell equipped with lethal weaponry, frequently em ...read more

Archaeologists Find Evidence for a Biblical Siege of Jerusalem

Posted on Categories Discover Magazine

A model of ancient Jerusalem. (Credit: Dennis Jarvis/Flickr) (Inside Science) -- In the 6th century B.C., the Babylonian king Nebuchadnezzar II, fearful that the Egyptians would cut off the Babylonian trade routes to the eastern Mediterranean region known as the Levant, invaded and laid siege to Jerusalem to block them. His army destroyed the temple the Hebrew king Solomon built there, and forced the city’s elite to exile in Babylonia. So began the Babylonian Exile or Captivity, an e ...read more

Electrostimulation Study Gets Alzheimer’s Patients to Recall Vivid Memories

Posted on Categories Discover Magazine

Participants in a recent trial experienced old memories, vividly. Halfpoint/Shutterstock.com Alzheimer’s disease is one of the most dreaded diagnoses, and the fear is particularly acute among older people. This complex brain disorder, which usually affects older individuals, can cause many cognitive disabilities, most notably memory impairment. About 5.7 million Americans are living with Alzheimer’s disease. In addition, millions of loved ones and caregivers are ...read more

Why Do Women Get Alzheimer’s More Than Men?

Posted on Categories Discover Magazine

MRI scans of patients show patients with Alzheimer's disease. (Credit: Atthapon Raksthaput/Shutterstock) Scientists are still unraveling why Alzheimer’s disease affects men and women disproportionately. Out of the five million Americans who have it, about 64 percent are women. Once in their 60s, women are twice as likely to develop Alzheimer’s than breast cancer, and more than twice as likely to develop Alzheimer’s as their male counterparts. And when women develop the di ...read more