Kirk Johnson

@leafdoctor

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

Washington, DC
Vrijeme pridruživanja: rujan 2010.

Tweetovi

Blokirali ste korisnika/cu @leafdoctor

Jeste li sigurni da želite vidjeti te tweetove? Time nećete deblokirati korisnika/cu @leafdoctor

  1. proslijedio/la je Tweet

    Humboldt was on top of the world, nearly. He was climbing Chimborazo, and though he could barely breathe, made sure to measured how high he was: 19,413 feet. It was a record that stood for 30 years.

    Poništi
  2. proslijedio/la je Tweet
    2. velj

    Why do I live in Colorado? The temperature was around 60° today, Feb 1. And we ended the day with such a spectacular sunset, I had to video it.

    Poništi
  3. 2. velj

    The way I see it, both art and science are driven forward by a mixture of curiousity, creativity, and execution.

    Poništi
  4. proslijedio/la je Tweet
    2. velj

    Global biodiversity loss: “even quite a few ecologists seem to lack an appreciation of the sheer magnitude of damage we’ve done to the planet.”

    Prikaži ovu nit
    Poništi
  5. proslijedio/la je Tweet
    1. velj

    In 1940, after publishing The Grapes of Wrath, John Steinbeck went on an expedition to the Gulf of California with marine biologist Ed Ricketts, where they collected specimens, including this octopus. Read “The Log from the Sea of Cortez” to learn more about this expedition!

    Poništi
  6. proslijedio/la je Tweet
    31. sij

    If you've been following the news, go beyond the headlines and visit our exhibition : Epidemics in a Connected World. This Sat., Feb 1, from 11am-1pm ET, we'll have an expert in the gallery, so stop by and get your questions answered.

    Poništi
  7. proslijedio/la je Tweet
    31. sij

    If you're looking for positivity & progress in global challenges, this is the year. I'm thrilled to join & many others for this April!

    Poništi
  8. 1. velj

    Fossil plant sites this good are truly rare. This one was such a delight to dig.

    Poništi
  9. proslijedio/la je Tweet
    30. sij

    Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles. Tune in or stream "Polar Extremes" on Wednesday, Feb. 5 at 8/7c on or on our Facebook page!

    Poništi
  10. proslijedio/la je Tweet
    31. sij

    Updates on are nicely framed by . An excellent close to One Health Awareness Month with Dan Lucey & others

    Poništi
  11. proslijedio/la je Tweet
    31. sij

    For our mash-up, here's a burrowing HORNED rodent, Ceratogaulus hatcheri. It lived ~6 MYA in Kansas and belongs to a group of rodents that includes squirrels and groundhogs. Its closest *living* relative is the mountain beaver Aplodontia rufa.

    Poništi
  12. proslijedio/la je Tweet
    31. sij

    Feb 5 🌎 NOVA: Polar Extremes feat. Make a note! This new special with explores the dynamic history—and future—of ice at the poles. 🌟 Featuring our own paleontologist Jonathan Bloch! More: NOVA:

    researchers bag earth from a fossil dig site
    Poništi
  13. proslijedio/la je Tweet
    30. sij

    Register for the free, live webcast today and inspire your students to pursue science. The program supports learning standards in Life Science.

    Prikaži ovu nit
    Poništi
  14. proslijedio/la je Tweet
    30. sij

    Teachers, here's your sneak peek of next week's (2/6) webcast. The interactive program will feature Smithsonian ornithologist Sahas Barve, who studies how 🐦🐦🐦stay warm!

    Prikaži ovu nit
    Poništi
  15. proslijedio/la je Tweet
    28. sij

    Our baby horseshoe crabs are quite the handful! These four have been hanging out in our touch tank. Come check them out!

    Poništi
  16. proslijedio/la je Tweet
    28. sij

    After more than 40 years of being a mystery, Deinocheirus turned out to be one of the weirdest dinosaurs ever known.

    Poništi
  17. proslijedio/la je Tweet
    26. sij

    Review: A Touching Elegy to a Man Who’s Still Alive

    Poništi
  18. proslijedio/la je Tweet
    26. sij

    So, so much gratitude to everyone who made last night’s premiere at so special.

    , , i još njih 5
    Poništi
  19. proslijedio/la je Tweet
    12. sij

    No. 23 : "It won’t be a surprise if this is a masterpiece." ( List)

    Poništi
  20. proslijedio/la je Tweet
    23. sij
    Poništi

Čini se da učitavanje traje već neko vrijeme.

Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.

    Možda bi vam se svidjelo i ovo:

    ·