-
US strikes Iran, vows to reimpose naval blockade
-
57 gored or bruised during Spain's San Fermin bull runs
-
Oil extends gains after fresh US strikes, stocks mostly rise
-
Wildfires advance in forest south of Paris
-
Families claim bodies as Bangkok fire toll rises to 30
-
Ukrainian men in Poland face legal limbo
-
Egg-free school meals scramble politics in India
-
Wildlife rescuers help birds survive Pakistan's hotter summers
-
US strikes Iran for third day, will reimpose blockade
-
Messi meets England at last with World Cup final place on the line
-
Italy's Cannone gets four-match ban for red card against All Blacks
-
Oil extends gains after latest US strikes, tech suffers more losses
-
Co-star says Sam Neill battled pneumonia before death
-
Young Australian men falling victim to online sexual extortion: regulator
-
Armenian apricots become geopolitical battleground with Russia
-
New era for Gibraltar as border controls with Spain set to end
-
Jay-Z pays tribute to NY hometown crowd and his 30-year legacy
-
England face might of Messi's Argentina in World Cup semi-final
-
Birthday boy Yamal stands by 'no fear' comment ahead of France clash
-
Spain to go on 'front foot' against France in World Cup semi: De la Fuente
-
Trump slashes two Utah protected areas by more than 90%
-
US strikes Iran for third night as Trump says deal still 'possible'
-
Spain 'favourites' says Deschamps ahead of World Cup semi-final showdown
-
Trump vows to hit Iran 'hard,' impose Hormuz transit fees
-
Norway receive heroes' welcome in Oslo after World Cup exit
-
France and Spain prepare to duel at World Cup
-
Pickford backs England to keep cool in tense Argentina World Cup semi
-
Five Britons among foreign Spanish wildfire victims
-
Oil prices surge on US-Iran attacks; tech shares fall
-
Ukraine allies pledge more air defence, pressure Russia
-
Thomas Tuchel: England's World Cup mastermind
-
'Until the end': The tireless, traumatic search for Venezuela quake victims
-
Mbappe paradox stirs club v country debate as France face Spain
-
Trump expected to shrink protected lands in Utah: reports
-
Trump reimposes Iran naval blockade, threatens Hormuz fees
-
Twelve US states sue to block Paramount's Warner Bros. takeover
-
US vows campaign to end ICC 'threat' to Americans
-
New boss Alonso calls for Chelsea 'hunger', wants Fernandez to stay
-
Yemen govt says hit Sanaa airport, Houthis attack Saudi Arabia
-
Knight excited for future after England career ends in India defeat
-
US judge voids 'improper' Trump tax deal
-
From bombmaking to motorcycle tweaks: how Nigerian jihadists use AI
-
US appeals court revives private cases alleging Tylenol link to autism
-
Edwards vows to 'upskill' England women for Ashes after India defeat
-
Spieth adamant he has more golf majors left in him
-
Hungary MPs pass constitutional tweak to oust Orban-allied president
-
'VAR-gentina?': conspiracy theories swirl ahead of World Cup semi-finals
-
Ukraine allies meet in Paris to boost air defence, pressure Russia
-
Counter-terror police take over investigation into UK politician's killing
-
Fitzpatrick blames betting for golf fans' bad behaviour
NASA, Pentagon developing nuclear-powered rocket for Mars voyage
NASA is partnering with a Pentagon research agency to develop a nuclear-powered rocket engine in preparation for sending astronauts to Mars.
NASA Administrator Bill Nelson said Tuesday that the US space agency will team up with the Defense Advanced Research Projects Agency (DARPA) to "develop and demonstrate advanced nuclear thermal propulsion technology as soon as 2027."
"With the help of this new technology, astronauts could journey to and from deep space faster than ever –- a major capability to prepare for crewed missions to Mars," Nelson said in a statement.
DARPA is the Pentagon's research and development arm and has played a role in many of the notable innovations of the 20th century including the internet.
NASA said nuclear thermal rockets can be three or more times more efficient than conventional chemical propulsion and would reduce transit time, essential for an eventual mission to Mars.
In a nuclear thermal engine, a fission reactor is used to generate extremely high temperatures.
Heat from the reactor is transferred to liquid propellant which is then converted into gas, which expands through a nozzle and provides thrust.
"DARPA and NASA have a long history of fruitful collaboration," DARPA director Stefanie Tompkins said, citing the Saturn V rocket that took the first astronauts to the Moon.
"The nuclear thermal rocket program will be essential for more efficiently and quickly transporting material to the Moon and, eventually, people to Mars," Tompkins said.
NASA conducted its last nuclear thermal rocket engine tests more than 50 years ago but the program was abandoned due to budget cuts and Cold War tensions.
E.AbuRizq--SF-PST