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Huge crowds await total solar eclipse in North America but clouds may spoil the view

Millions of spectators along a narrow corridor stretching from Mexico to the U.S. to Canada eagerly awaited Monday's celestial sensation — a total eclipse of the sun — even as forecasters called for clouds.

The best weather was expected at the tail end of the eclipse in Vermont and Maine, as well as New Brunswick and Newfoundland.

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What to know about Monday's total solar eclipse in US, Mexico and Canada

North America is on the verge of another masking of the sun.

Monday's total solar eclipse will make landfall along Mexico's Pacific coast and cross into Texas and 14 other U.S. states, before exiting over Canada.

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Faster spinning Earth may cause timekeepers to subtract a second from world clocks

Earth's changing spin is threatening to toy with our sense of time, clocks and computerized society in an unprecedented way — but only for a second.

For the first time in history, world timekeepers may have to consider subtracting a second from our clocks in a few years because the planet is rotating a tad faster than it used to. Clocks may have to skip a second — called a "negative leap second" — around 2029, a study in the journal Nature said Wednesday.

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Sun to totally eclipse across North America on April 8

The sun is about to pull another disappearing act across North America, turning day into night during a total solar eclipse.

The peak spectacle on April 8 will last up to 4 minutes, 28 seconds in the path of total darkness — twice as long as the total solar eclipse that dimmed U.S. skies in 2017.

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What's Pi Day all about? Math, science, pies and more

Math enthusiasts around the world, from college kids to rocket scientists, celebrate Pi Day on Thursday, which is March 14 or 3/14 — the first three digits of an infinite number with many practical uses.

Around the world many people will mark the day with a slice of pie — sweet, savory or even pizza.

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Four astronauts from four countries return to Earth after six months in orbit

Four astronauts from four countries caught a lift back to Earth with SpaceX on Tuesday to end a half-year mission at the International Space Station.

Their capsule streaked across the U.S. in the predawn darkness and splashed into the Gulf of Mexico near the Florida Panhandle.

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First Arab woman to graduate NASA training shoots for the Moon

Like her ancestors before her, Emirati astronaut Nora al-Matrooshi has spent much of her life gazing up at the stars and dreaming of flying to the Moon.

This week, she became the first Arab woman to graduate from NASA's training program, ready to blast off into the cosmos.

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4 new astronauts head to International Space Station for 6-month stay

Four astronauts headed to the International Space Station on Sunday where they will oversee the arrivals of two new rocketships during their half-year stint.

SpaceX's Falcon rocket blasted off from Kennedy Space Center, carrying NASA's Matthew Dominick, Michael Barratt and Jeanette Epps and Russia's Alexander Grebenkin.

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Drying the upper atmosphere: Scientists create new idea to hack warming planet

Government scientists have cooked up a new concept for how to potentially cool an overheating Earth: Fiddle with the upper atmosphere to make it a bit drier.

Water vapor — water in its gas form — is a natural greenhouse gas that traps heat, just like carbon dioxide from burning coal, oil and gas. So researchers at the National Oceanic and Atmospheric Administration and NASA figure if they can just inject ice high up in the air, water vapor in the upper atmosphere would get a bit drier and that could counteract a small amount of the human-caused warmth.

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Turkey first astronaut returns from 3-week mission to International Space Station

Turkey's first astronaut returned home to a hero's welcome Monday, portrayed as a symbol of the country's advances in technology and aerospace.

Alper Gezeravci was greeted by bouquet-laden children at Ankara's Esenboga Airport as he returned from a private three-week mission to the International Space Station. In return, he handed out Turkish flags he had carried with him into space.

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