Now playing Next USA Jupiter will be at its biggest and brightest next week. Here's how to get a good look. With binoculars or a small telescope, skywatchers may be able to see not just the planet itself but also its biggest moons. 07/06/2019
Now playing Next USA Spacecraft that sail on sunshine could be the next big thing in spaceflight These solar sails could herald a new era of spaceflight in which spacecraft forgo the rocket motors they've relied on for decades. 03/06/2019
Now playing Next USA Ancient star explosions could have led early humans to walk upright Scientists say supernovas blasted the early Earth with radiation that triggered forest-razing wildfires, prompting early humans to become bipedal. 30/05/2019
Now playing Next USA How did Earth get its water? Scientists think they know A new theory holds that the same cosmic collision that created the moon more than 4 billion years ago brought water to our planet. 29/05/2019
Now playing Next USA 100 years ago, this eclipse proved Einstein right and changed our understanding of the universe When the moon blotted out the sun on May 29, 1919, scientists were able to confirm the physicist's theory of relativity. 27/05/2019
Now playing Next USA The universe may be a billion years younger than we thought. Scientists are scrambling to figure out why. New research suggests that the Big Bang that birthed the cosmos occurred 12.5 billion years ago. 18/05/2019
Now playing Next USA NASA photos show crash site of Israel's Beresheet moon lander The photos show a dark smudge where the spacecraft struck the lunar surface at a speed of more than 2,000 miles an hour. 15/05/2019
Now playing Next USA Jeff Bezos foresees a trillion people living in millions of space colonies. Here's what he's doing to get the ball rolling. The billionaire tycoon's ideas draw from the vision of physicist Gerard K. O'Neill, who pioneered concepts for space settlements in the 1970s. 15/05/2019
Now playing Next USA Shrinking, shaking, wrinkling: New study shows the moon is racked by moonquakes as it shrivels The findings come after researchers took a fresh look at data from seismometers that Apollo astronauts deployed on the moon in the 1960s and 1970s. 14/05/2019
Now playing Next USA New Hubble Space Telescope photo is a 'living history book' of our universe The eye-popping image shows more than a quarter of a million galaxies. 11/05/2019
Now playing Next USA Scientists finally solve mystery of weird aurora-like lights in the sky Known as STEVE, the ribbons of pink or mauve light were first observed in 2016. 06/05/2019
Now playing Next USA Sanders' gun votes again a potential liability among Democratic base His past opposition to legislation to punish gun manufacturers could be a particular obstacle for energized young voters. 03/05/2019
Now playing Next USA Gun control case study: A mass shooting, major reforms, then a political backlash The dramatic saga of what happened in Colorado when 2020 contender John Hickenlooper was governor holds lessons for Dems seeking the White House and the nation. 14/04/2019
Now playing Next USA Death penalty repeal sweeping across states as both parties get on board "I think with the death penalty, we've crossed the tipping point on the question of innocence," one expert said. 07/04/2019
Now playing Next USA Teenager tells police he is boy who went missing at age 6 in 2011 "I just prayed that when he was old enough that he would remember us and contact us," Timmothy's grandmother said. 04/04/2019
Now playing Next Ukraine Russian bears place bets on Ukraine's presidential election Zoo animals in Russia have been tasked with predicting the outcome of this weekend's presidential election in Ukraine 28/03/2019
Now playing Next USA Northern lights may dip farther south than usual this weekend Light shows could be visible in Iowa, Colorado and Washington over the weekend. 22/03/2019