Why tornadoes so difficult to forecast:
on.natgeo.com/13IKMlb Photos: Oklahoma's tornado from space
on.natgeo.com/10M0l6l The African clawed frog spreads deadly disease:
on.natgeo.com/17Wkboa The mystery behind risk: Why we continue to push boundaries
on.natgeo.com/14qzNw0 #LetsExplore Watch: Astronauts in space
on.natgeo.com/Z9mNfy Live from the Geography Bee:
on.natgeo.com/11bEXND Why did penguins stop flying?
on.natgeo.com/12s8xuR Home or on the road: 5 tips to keep you healthy
on.natgeo.com/18dKT9j Scientists discovered a link between gut bacteria and obesity:
on.natgeo.com/10IZMtX Photos: Nano "flowers" created
on.natgeo.com/117OZcS Photo of the Day: Ice-Skater, Sweden
on.natgeo.com/10Vnjru #pod #photography Protecting the world's waters with photography:
on.natgeo.com/12JLZYi 
Photo by @paulnicklen - A leopard seal gets curious and decides to see what a camera dome tastes like in the icy waters of Antarctica. #latergram
iphone photo: @ivankphoto Open Wide, Young Giant Tortoises at the breeding center in #Puerto #Villamil, #Isabela, #Galapagos, #Ecuador, @runa_photos. They live well over 100 years.
@joemcnallyphoto. Lots of these when u travel alot. Empty faceless hotel hallways radisson @ narita airport. #thephotosociety
Your photos of the tornado in Oklahoma:
on.natgeo.com/11WaUv5 Women scientists who were overlooked:
on.natgeo.com/11VPChf Space photos: A space walk, a nebula full of stars, and more
on.natgeo.com/191UyBa 
iphone photo: @ivankphoto Leaves, Hacienda Cafetera, #sancristobal, #galapagos, #ecuador, @runa_photos
Why was the Oklahoma tornado so hard to predict?
on.natgeo.com/12s74ES Photos: Aftermath of the two-mile-wide tornado in Oklahoma
on.natgeo.com/12JP0HW This week in the sky: The brightest stars, a lunar eclipse, and more
on.natgeo.com/11VDvR4 
Worked overnight in the #AMNH last night, (pictures to come) It was nice to walk around with no other visitors to deal with, it is a real honor to have this kind of access to the beautiful collection of the museum. I had a great team and made some very nice pictures last night. Thanks! @alicegabrine
Storm chaser says there's a lot we don't know about tornadoes:
on.natgeo.com/YWPhXr Opinion: What we can change to avoid another Everest dispute
on.natgeo.com/14qwLrz 
Photographer Aaron Huey (@argonautphoto) on assignment in the #Khumbu #Nepal on a #trek to #MtEverest #BaseCamp Day 6: Acclimatization day Dingboche. Still cloudy, with small glimpses of peaks.
Species of dinosaur-era creature lived during Cretaceous period:
on.natgeo.com/105Onc9 Auroras glisten above a full moon in this awe-inspiring time-lapse:
on.natgeo.com/10hKwsq Thanks
@30SECONDSTOMARS for the great Hangout question! If you missed their new video, check it out:
on.natgeo.com/18dxii9 Thanks
@conradanker,
@TheRealBuzz and all of you for joining our Hangout! In case you missed it:
on.natgeo.com/18dvGoR #LetsExplore 
People feel connected to the @Gowanus Canal for different reasons. @Artist Chris Wright is drawn to the forms he finds in the @landscape of industry. He was rendering these large storage tanks in small scale to carry them away. @FritzPhotos
A fan of space? These astronauts who are on social media:
on.natgeo.com/16351NX Tracing the history of breast cancer:
on.natgeo.com/116SdgH 
Photo by @andy_bardon - Concentration and balance are required to cross the crevasses in the Khumbu Icefall below Mt Everest. Ropes and aluminum ladders are lashed together to help climbers navigate this maze of jumbled ice. Huge chunks of ice tumble down the route from time to time; they range from
WATCH LIVE: What does it mean to take risks? Join our chat with
@TheRealBuzz and
@conradanker on.natgeo.com/162MEZu Did you ask our risk takers a Hangout question?
@JaredLeto from
@30SECONDSTOMARS did:
on.natgeo.com/1170MYQ #LetsExplore Why visit Paris in the spring?
on.natgeo.com/116SIr9 Want to spice up your diet? Try insects:
on.natgeo.com/18c47w4 
@marcusbleasdale The Blue Hour with midnight sun taken while on assignment on mid summers night 2012, at 2am in the morning in Northern #Norway. Glass like #seas and heavy #blue skies meet at the crags of the #Lofoten hills. Truly breathtaking silence. Read more in this months @natgeo magazine The L
iphone photo: @ivankphoto, Leon Dormido, aka Kicker Rock. Here we swam with Eagle Rays and Hammerheads, #sancristobal, #galapagos, #ecuador, @runa_photos
How many cancer-causing genes are there? Experts explain:
on.natgeo.com/13mRMk5 
Photographer Aaron Huey (@argonautphoto) on assignment for @NatGeo in the #Khumbu #Nepal. Day 5: Pangboche to Dingboche past #Buddhist paintings with #Lhotse in the distance. #MtEverest #BaseCamp #trek
Photo by @stefanounterthiner. Springtime is here and the alpine #marmots are out, but still lots of snow this year! Working on #assignment for @natgeo in the Italian #Alps. @thephotosociety #wildlife
Structure of amber doesn't change-even after millions of year:
on.natgeo.com/15MUOFe Photo of the Day: Summer Cottage, Spain
on.natgeo.com/13vhmqu #pod #photography 
Photographer Aaron Huey (@argonautphoto) on assignment in the #Khumbu #Nepal. Day 4: hike from Namche to Pangbuche on our way to #MtEverest #BaseCamp