today's theme was inspiration, the inspiration of saving baby grace, and the devotion of dr curts bergd the 16-year-old girl pushing the boundaries of scenes. i absolutely loved it. if you guys want to see more, techknow. >> dive deep into these stories and go behind the seconds at aljazeera.com/techknow. follow our contributors on twitters, facebook, google+ and >> on techknow... >> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america > pass >>> this is al jazeera america. i'm thomas drayton in new york. let's get you caught up on the top stories at this hour. fire in the night sky over gaza as israel's ground offensive enters its fourth day. >> i have seen so much, so many screams, so many devas

today's theme was inspiration, the inspiration of saving baby grace, and the devotion of dr curts bergd the 16-year-old girl pushing the boundaries of scenes. i absolutely loved it. if you guys want to see more, tune in next time here on techknow. >> dive deep into these stories and go behind the seconds at aljazeera.com/techknow. follow our contributors on twitters, facebook, google+ and more. techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >>> this is al jazeera america. i'm thomas drayton in new york. let's get you caught up on the top stories of this hour. international monitors in ukraine struggle to get unrestricted access to the crash site of malaysia airlines mh17. ban ki-moon heads to qatar to try to broker a ceasefire with the palestinian president. activists take to the