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NASA shows how Hurricane Irma changed the Caribbean's look

Hurricane Irma took its toll, even changing the overall appearance of islands such as Barbuda. But an ecologist tells the space agency the trees will recover.

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<p>Beyond getting to Mars more quickly, a new form of laser-based propulsion could propel us to far-flung exoplanets faster than has ever been possible.</p>

Three asteroids give Earth a close shave in a single week

The discovery of the new asteroids comes before what could be the closest call of the year with one of the cosmic visitors.

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The dawn of a 'transgenic wilderness' is upon us

Genetically modified hybrid animals could rehabilitate ecosystems that have been harmed by human development.

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<p>I would name them Pinky and Spotty.</p>

NASA astronaut adopts unusual 'pets' in space

Astronauts on the space station don't have dogs or cats to keep them company, so sometimes they create their own microgravity pets.

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How we'll save encryption from the crypto-apocalypse

Quantum computing poses a mortal threat to computer security as we know it.

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<p>Venus is seen next to the crescent moon during the daytime, prior to the start of occultation, on Monday, Dec. 7, 2015 in Washington, D.C.&nbsp;</p>

Look up! The moon is in very rare formation right now

In the latest lunar rarity since August's total solar eclipse, the moon is busy covering for a half dozen other heavenly bodies in a single day.

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<p>Cassini's last observations of Iapetus show a moon of contrasts.</p>

See Cassini's last look at Saturn's weird yin-yang moon

NASA shares the spacecraft's final view of dark and light surfaces contrasting on Saturn's fascinating moon Iapetus.

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<p>A Zipline rests on the launchpad, ready to be slingshot into the air so it can deliver blood to one of Rwanda's hospitals.&nbsp;</p>

Drones deliver blood to health clinics across Rwanda

With innovative health care spreading throughout the countryside, Rwanda embraces drones.

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Taking health care to the people

Rwanda is adding clinics, power and infrastructure to places where roads and electricity are practically nonexistent.

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<p>Construction is buzzing on the 250-acre piece of land, donated by the Rwandan government, that will become home to the University of Global Health Equity medical school.&nbsp;</p>

Health care comes to Rwanda's remote villages

Drones, solar power and high-speed internet are rapidly bringing the 21st century to rural Rwanda.

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<p>An F-22 Raptor, part of the US Air Force's modern inventory, flies in 2016 with a trio of F-86 Sabres, Korean War-vintage aircraft.</p>

US Air Force hits 70 years of flying the wild blue yonder

Or is it 110? The roots of today's Air Force stretch back to the biplane era, but the service really got going as we know it at the dawn of jet aircraft.

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Drones, sun — and a strong will — elevate Rwanda's health care

Infamous for its genocide, Rwanda is using every means it can to make itself Africa's health care leader. It hasn't been easy.

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Apple's iPhones lack one key feature on premium Android phones

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Google's Pixel 2, Pixelbook, Home Mini: Everything that leaked

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Massachusetts AG sues Equifax over massive data breach

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