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  • China announces climate target for Paris deal Tuesday, 30 Jun 2015 | 9:53 AM ET

    PARIS— Top carbon polluter China confirmed it will try to cap its rising emissions before 2030 while the U.S. and Brazil pledged to boost renewable energy sources in a series of announcements Tuesday in anticipation of a global climate pact in Paris. In a submission to the U.N., China repeated an earlier pledge to achieve a peak in emissions around 2030 and...

  • Something to watch: A rare leap-second tonight Monday, 29 Jun 2015 | 1:38 PM ET
    Workers clean the east-facing clock face of the Elizabeth Tower of the Houses of Parliament in London.

    On Tuesday night, scientists will add one "leap second" to the world's clocks, and computer systems everywhere are bracing for its effects.

  • Turf wars: How this $40B industry helps and hurts Saturday, 27 Jun 2015 | 9:00 AM ET
    Sheep Meadow in Central Park is a mixture of four types of turfgrass.

    There are acres of green turf around the country, but lawn maintenance has stirred a debate about its environmental impact.

  • ANCHORAGE, Alaska— One Royal Dutch Shell offshore drill rig is headed to Alaska and a second is poised to leave, despite lacking final federal permits that would allow exploratory drilling and possible confirmation of rich oil reserves under the Chukchi Sea. A spokesman for Royal Dutch Shell PLC said that's routine. The U.S. Geological Survey estimates there...

  • 'Unusual' number of wildfires burn across Alaska Friday, 26 Jun 2015 | 9:51 AM ET
    Willow Fire Capt. Leo Lashock responds to a wildfire burning near Willow, Alaska, June 14, 2015.

    Authorities in Alaska are reporting a high number of ongoing wildfires that are posing a new threat to homes.

  • The one war Massachusetts can win Thursday, 25 Jun 2015 | 10:00 AM ET
    Atlas, an MIT robot, competed in the DARPA Robotics Challenge this month. Here, Atlas is cutting a round hole in a piece of sheetrock.

    About 150 robotics companies have sprung up in Massachusetts as the state rivals Silicon Valley and Pittsburgh for industry supremacy.

  • A big step toward solar power for small devices Wednesday, 24 Jun 2015 | 4:56 PM ET
    New ultralow-power circuit improves efficiency of energy harvesting to more than 80 percent.

    Powering small devices with solar energy, including wearables, medical devices, and the Internet of Things is more feasible with new circuit.

  • Navy celebrates once-secret sub now on display in museum Wednesday, 24 Jun 2015 | 11:55 AM ET

    GROTON, Conn.— A once-secret submarine in U.S. military research and expeditions is being celebrated for its advanced technology, exploration of the ocean floor and role as a workhorse. The nuclear-powered NR-1 launched in 1969, the same year the U.S. put a man on the moon, and was taken out of service in 2008. It is now on display, minus some of its parts, at Submarine...

  • SAN JUAN, Puerto Rico— The worst drought in five years is creeping across the Caribbean, prompting officials around the region to brace for a bone dry summer. From Puerto Rico to Cuba to the eastern Caribbean island of St. Lucia, crops are withering, reservoirs are drying up and cattle are dying while forecasters worry that the situation could only grow worse in the...

  • Two big problems with generic-drug substitution Tuesday, 23 Jun 2015 | 3:54 PM ET
    Pharmaceutical drugs

    Automatic generic-drug substitution poses several big problems, says NYU Professor Melissa Schilling.

  • Google's artificial intelligence makes crazy art Tuesday, 23 Jun 2015 | 2:54 PM ET

    The artificial neural network that tags faces and objects in photos makes surprisingly inventive images.

  • Why a robot cockroach actually makes sense Tuesday, 23 Jun 2015 | 9:00 AM ET
    Cockroach

    A simple, low-cost design inspired by an unloved insect can help robots navigate tough physical terrain.

  • White House: Action needed now to slow climate change Monday, 22 Jun 2015 | 12:32 PM ET

    The report comes as Republicans in Congress seek to undo the administration's environmental policies, including an expected plan by the EPA to target coal-fired power plants, and days after Pope Francis issued a stern warning about global warming's consequences, especially for the poor and underdeveloped nations. The White House report is part of a...

  • Earthquakes not caused by fracking...exactly Friday, 19 Jun 2015 | 12:43 PM ET
    Workers are pictured on a drilling rig near Calumet, Okla.

    Stanford researchers say the now daily earthquakes in Oklahoma are not caused by fracking itself, but by a related activity.

  • Microbiome studies changing human health Friday, 19 Jun 2015 | 8:33 AM ET
    Microbiome changing human health

    CNBC's Meg Tirrell explains what the microbiome is and why it's medicines new frontier.

  • CSI Africa? Using elephant DNA to fight poachers Thursday, 18 Jun 2015 | 2:05 PM ET
    A KWS security officer stands near a burning pile of 15 tons of elephant ivory seized in Kenya at Nairobi National Park on March 3, 2015.

    Scientists used the DNA found in illegally hunted elephant tusks to help African law enforcement agencies track ivory poachers.

  • Tom Brokaw: I am in remission, I feel quite good Thursday, 18 Jun 2015 | 7:31 AM ET
    Tom Brokaw: I am in remission, I feel quite good

    Fmr. NBC Nightly News Anchor Tom Brokaw, shares his greatest life lessons and biggest surprises, after the diagnosis and treatment for multiple myeloma, which is an incurable but treatable cancer.

  • What you don't know about sunscreen could hurt you Wednesday, 17 Jun 2015 | 1:57 PM ET
    Sunburn

    Despite new FDA rules meant to clarify labels on sunscreen, many people do not understand what they're doing with it.

  • Scenes from Tropical Storm Bill ravaged Texas Wednesday, 17 Jun 2015 | 12:19 PM ET
    Waves crash onto the Matagorda beach pier as Tropical Storm Bill comes on shore on Tuesday, June 16, 2015, in Matagorda, Texas.

    Tropical Storm Bill is Texas's second battle with storms in 2015, on the heels of deadly floods in May.

  • Go ahead, get that liberal arts degree Wednesday, 17 Jun 2015 | 11:18 AM ET
    College graduate

    Practical majors like pharmaceutical marketing are exploding. But here's why they're not all that, says one Wharton professor.