An international team of researchers has found that a newly developed blood test is highly accurate in aiding the detection of Alzheimer's disease.
Why it matters: The test could distinguish Alzheimer's from other conditions, and may be able to detect changes in the brain 20 years before dementia symptoms occur, per thestudy findings, published in the Journal of the American Medical Association (JAMA) Tuesday.
On July 15, Russia ratcheted up international tensions by testing what appears to be a weapon to destroy enemy satellites in space, according to the U.S. Department of Defense. But this is far from the first time the country has put on a display of force in orbit.
Why it matters: Russia has been building out its space weapons capabilities for years. The recent test — which did not destroy a satellite — comes after Russia staged another anti-satellite test of a different kind of system in April.
Perseverance will carry new tech to Mars that represents major technological advances since NASA's last rover — Curiosity — landed on the Red Planet in 2012.
Why it matters: These new experiments and technology demonstrations will fill in gaps in knowledge scientists have about the world and set up future robotic missions in the process.
More than any of its increasingly sophisticated predecessors, NASA's next robot on Mars will pave the way for getting humans to the Red Planet.
Why it matters: Rovers, landers and orbiters have beamed back invaluable data about Mars for decades, but the next phase in exploration depends on human explorers. One astronaut conducting science on Mars' surface could yield more efficient and quicker results than even the most advanced robot.
