By Ashley Strickland and Katie Hunt, CNN
It’s called rocket science for a reason.
When NASA Deputy Administrator Pam Melroy was preparing for one of her space shuttles launched as an astronaut in the early 2000s, she told relatives to plan a week-long trip to Florida for a vacation and they might see a launch.
Members of The Artemis I mission team gave the same advice to their families – and it’s because a multitude of factors must be perfect for a successful space launch.
The launch team made the decision to postpone the liftoff of Artemis I on Monday when weather delays and mechanical issues arose during the countdown.
A second launch attempt was scheduled for Saturday afternoon, but that too was canceled.
A troublesome liquid hydrogen leak is the cause of Artemis I’s second scrub.
Liquid hydrogen is one of the propellants used in the rocket’s large central stage. The leak prevented the launch team from being able to fill the tank with liquid hydrogen despite multiple troubleshooting attempts.
NASA is expected to share an update at 4 p.m. ET on Saturday.
NASA Administrator Bill Nelson said mission officials will hold a meeting to discuss next steps and determine if a launch is possible on Monday or Tuesday, or if the rocket stack should be brought back to the building. assembly of vehicles. If brought back into the building, a launch may not be possible until mid-October.
Archaeologists have solved a medieval mystery using ancient DNA.
The remains of six adults and 11 children found by builders at the bottom of an 800-year-old well in Norwich, England, have been identified as victims of anti-Semitic violence.
The genomes of six of the individuals showed that four of them were related, including three sisters, the youngest of whom was between 5 and 10 years old. Further analysis of the genetic material suggested that all six were Ashkenazi Jews and allowed researchers to deduce the physical traits of a toddler found in the well.
The researchers said the discovery brought to light the “true horror” of what persecuted Jewish communities have experienced.
An encounter with our planet’s deep past can happen just about anywhere.
A Portuguese homeowner discovered fossilized dinosaur fragments in his garden, when construction work revealed the chest bones of a towering sauropod – a long-necked, industrious plant-eater.
Paleontologists believe the dinosaur was around 12 meters tall and 25 meters long.
Steve Brusatte, professor of paleontology at the University of Edinburgh in Scotland, who was not involved in the research on the specimen, called the find “gobsmacking – a dinosaur rib cage sticking out of someone’s backyard “.
Unlike Earth, Mars does not have oxygen-generating forests. However, engineers from NASA and the Massachusetts Institute of Technology have tested a mechanical shaft that could make the Red Planet more hospitable to astronauts.
Mars’ In-Situ Oxygen Resource Utilization Experiment – better known as MOXIE – successfully made oxygen from Mars’ carbon dioxide-rich atmosphere as part of the mission NASA’s Perseverance rover.
The toaster-sized technology demonstration has produced oxygen over seven experimental runs since April 2021 under various atmospheric conditions.
In each run, MOXIE achieved its goal of producing 6 grams of oxygen per hour, about the rate of a modest tree on Earth. Researchers hope a full-scale version will produce enough oxygen to sustain humans on Mars and power a rocket for astronauts to return to Earth.
The climate has changed
The Great Pyramid of Giza was the tallest building in the world for around 4,000 years.
How this monumental feat of ancient engineering came together remains a mystery, but a new study confirms a long-held theory that pyramid builders took advantage of a now-lost arm of the Nile to move building materials .
The researchers studied plant pollen stored in the earth’s cores to identify areas rich in vegetation that indicated high water levels and to create models of what the waterscape looked like around the pyramids. the last 8000 years. The data revealed that the Khufu branch of the Nile had high water levels during the construction of the three main pyramids, which could have allowed the ancient builders to develop an unusual system of moving materials by boat.
By the time Alexander the Great conquered Egypt in 332 BC, however, environmental factors had reduced the Khufu branch to a tiny canal, the study found.
Escape for a moment with these extraordinary stories:
— A snowy deer and a pool party with frogs are some of the standout entries in the 2022 Wildlife Photographer of the Year competition.
— The genetic code of the so-called immortal jellyfish could reveal the secret to reversing aging.
— The James Webb Telescope is on the rise. Discover its first direct image of a gas giant exoplanet as well as a spellbinding view of the phantom galaxy.
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