Kirk Johnson

Smithsonian @NMNH director & paleobotanist. Works with artists to visualize extinct landscapes. [Pers/Prof account, opinions my own]

[Peter Wilf @RadioGondwana]

Just a reminder that the 2009 Leaf Manual is available open access ! Use it and enjoy the leaves. 🍃🌿🍂
https://t.co/SlPSa0wIJl

[Quite Interesting @qikipedia]

This is what happens when a walrus falls asleep on a surfacing submarine...

[ARCUS @ArcticResearch]

You should only look at today's Sea Ice for #Walrus Outlook if you are prepared to have your mind blown by the incredible local observations we received this week!

https://t.co/RbfMFKFy2U

#IndigenousKnowledge #BeringSea #Subsistence #SeaIce #Arctic #SIWO

[Ilja Andrejev @iljaandreev]

Walrus attacked ruzzians in Arctica. No one likes ruzzians🗑🇷🇺🚮
#Russia #Fellas #RussiaIsLosing

[Massimo @Rainmaker1973]

North America about 77 millions years ago

[Chicago Review Press @ChiReviewPress]

Preorder this updated edition! With new dinosaurs, color illustrations, and tales from the road, this is the perfect book for any dino-lover! 🦖

https://t.co/NugnJv5Gvv
@leafdoctor #dinosaurs #fossils

[Nature @PBSNature]

Thanks for watching The Platypus Guardian tonight! What was the highlight of the episode for you? #NaturePBS

[Institute of Natural Sciences Belgium @nat_sciences_be]

New name, new identity and new website : Welcome to the Institute of Natural Sciences! 🎉
#naturalsciencesbelgium

[Kirk Johnson @leafdoctor]

Amazing, just amazing

[Russ McSpadden @PeccaryNotPig]

This beautiful and rare example of a wild jaguar in the snow is of Yo'oko in Arizona's Huachuca Mountains in 2017. He was name by students at Hiaki High School at the Pascua Yaqui Pueblo near Tucson. Yo'oko means jaguar in the Yaqui language. This is a good reminder that...1/

[Kirk Johnson @leafdoctor]

@PalaeoJules Really great!

[USGS @USGS]

Big news: USGS scientists & partners have confirmed, with 2 new lines of evidence, that human footprints found in White Sands Nat'l Park show that people lived in North America 21-23,000 yrs ago—much earlier than previously thought!

More here: https://t.co/Fft0s2RRzA

Imgs: NPS

[Scott D. Sampson @DrScottSampson]

Ever wondered what it's like to go inside the vast collection of a natural history museum, or why we keep such vast natural treasures? Well, wonder no more. This terrific, interactive piece by @peterhartlaub explores the collections of @calacademy. Enjoy!
https://t.co/3zCPEkZ14M

[Dr. Karly E. Cohen @Karly_Cohen]

Another surprise visitor to the San Juan islands today! A giant oarfish washed up on Friday Harbor in near perfect condition. Check out those jaws!!

[Ameghiniana - a gondwanan paleontological journal @ameghiniana]

AMEGH 60(6) presents the obituary of Dr. Sergio Archangelsky.

Born in Morocco on March 27, 1931. The family moved to Argentina, where Sergio studied Geology at the @UBAonline
His final dissertation topic was Paleobotany, and that was the beginning of his brilliant career.

[Buitengebieden @buitengebieden]

The defense mechanism of an armadillo..

[Kirk Johnson @leafdoctor]

@joshforwood Amazing. Well done!

[Tom Yulsman @yulsman]

To fully grasp this summer's frightful heat, imagine 800,000 Hiroshima atom bombs exploding daily. That amount of energy accumulating in the climate system is why July was the hottest month of 1,716 on record. @DiscoverMag @DrJamesEHansen @MichaelEMann https://t.co/lhFDKB5LbQ

[Smithsonian NMNH @NMNH]

#TBT to May of 1909 and the installation of the last stone on the south porch of the museum. 🏛️

A few short months later staff began to occupy the building and move the then 10 million item collections by horse-drawn cart.

Credit: @SILibraries, Record Unit 95, Box 33, Folder 4

[Scott Duncan @ScottDuncanWX]

Craziest thing you will see today...

Stunning upwards lightning above Acatenango Volcano in Guatemala 🇬🇹

[Smithsonian NMNH @NMNH]

This slab of fossilized crinoid specimens date from 345-280 million years ago and was collected in Indiana. Displaying the wide variety of shapes and sizes found in this class of extinct echinoderms, this specimen includes 15 different species.

Catalog number USNM S 7342