Signs of biological activities of 28,000-year-old mammoth nuclei in mouse oocytes visualized by live-cell imagingThe 28,000-year-old remains of a woolly mammoth, named ‘Yuka’, were found in Siberian permafrost. Here we recovered the less-damaged nucleus-like structures from the remains and visualised their dynamics in living mouse oocytes after nuclear transfer. Proteomic analyses demonstrated the presence of nuclear components in the remains. Nucleus-like structures found in the tissue homogenate were histone- and lamin-positive by immunostaining. In the reconstructed oocytes, the mammoth nuclei showed the spindle assembly, histone incorporation and partial nuclear formation; however, the full activation of nuclei for cleavage was not confirmed. DNA damage levels, which varied among the nuclei, were comparable to those of frozen-thawed mouse sperm and were reduced in some reconstructed oocytes. Our work provides a platform to evaluate the biological activities of nuclei in extinct animal species.1
America’s wildlife are in crisis. 1/3 of all species in the country currently face a heightened risk of extinction. This bill represents a bold, bipartisan vision for how we can RecoverWildlife & create jobs in every state across the nation.America’s wildlife are in crisis. 1/3 of all species in the country currently face a heightened risk of extinction. This bill represents a bold, bipartisan vision for how we can RecoverWildlife & create jobs in every state across the nation.
Secretary-General's video message: "COVID-19: How do we prevent the pandemic from becoming a media extinction event?”My thanks to the United Nations Department of Global Communications for organizing this gathering in cooperation with the philanthropic organization Luminate. The events of the past year have reminded us that access to reliable information is more than just a basic human right – it can also be a matter of life and death. The COVID-19 pandemic has been accompanied by an enormous concurrent “infodemic”. Misinformation and hate speech have proliferated, jeopardizing the health of millions of people worldwide, undermining confidence in vaccines and science, and dividing communities and countries.
COVID-driven ‘media extinction’: Public service journalism struggling to surviveMedia which serves the public interest, not only provides vital information communities need to take informed action, it also dispels misinformation, strengthens democratic accountability and boosts sustainable development. But the coronavirus pandemic has hit journalism hard, drying up revenue and putting its very existence into question. UN News’ Vibhu Mishra speaks with Sheetal Vyas, Founding Executive Director of International Fund for Public Interest Media, about the Fund’s bold, billion dollar rescue plan to help save journalism for the public good.
Penguin size comparison | Living Penguin | Animal Size Comparison 2021Penguins are a group of aquatic flightless birds. They spend about half of their lives on land and the other half in the ocean. Most penguins feed on krill, fish, squid and other forms of sea life, which they catch while swimming underwater. However, many species are threatened or endangered. In today's video, let's compare the size of the penguins that walk the earth. Disclaimed: * This comparison video is made based on Community Discussion, relevant Source, Number, and Facts listed might not be Up-To-Date, valid, or in any specific order. * Please, support the original creators. All credits in this video - None of these images, music & video clips were created/owned by us. - This video is purely fan-made, if you (owners) want to remove this video, please contact me through the YouTube private messaging system. We will respectfully remove it. 1. Little Penguin (Eudyptula minor) - Living - 33cm (13in) / 1.5kg 2. White-flippered penguins (Eudyptula minor albosignata) - Living - 30~40cm （12-16.1in) / 1-1.5kg 3. Galapagos Penguin (Spheniscus mendiculus) 1 - Living - 48-50cm (19-21in) / 2.5-4.5kg 4. Northern Rockhopper Penguin (Eudyptes moseleyi) - Living - 52-55cm (20-22in) / 2.5-3kg 5. Southern Rockhopper Penguin (Eudyptes chrysocome) - Living - 45-58cm (18-23in) / 2-3.4kg 6. Fiordland Penguin (Eudyptes pachyrhynchus) - Living - 53-60 (21-24in) / 3.5-5.9kg 7. Snares Penguin (Eudyptes robustus) - Living - 50-70cm (19.5-27.5in) / 2.5-4kg 8. Erect-crested Penguin (Eudyptes sclateri) - Living - 50-70cm (19.5-28in) / 2.5-6kg 9. Humboldt Penguin (Spheniscus humboldti) - Living - 56-70cm (22-28in) / 3.6-5.9kg 10. African Penguin (Spheniscus demersus) - Living - 60-70cm (24-28in) / 2.2-3.5kg 11. Adelie Penguin (Pygoscelis adeliae) - Living - 46-71cm (18-28in) / 3.6-6kg 12. Macaroni Penguin (Eudyptes chrysolophus) - Living - 71cm (28in) / 3.7-5.5kg 13. Magellanic Penguin (Spheniscus magellanicus) - Living - 61-76cm / 2.7-6.5kg 14. Royal Penguin (Eudyptes schlegeli) - Living - 65-76cm (26-30in) / 3-8kg 15. Chinstrap Penguin (Pygoscelis antarcticus) - Living - 68-76cm (27-30in) / 3.2-5.3kg 16. Yellow-eyed Penguin (Megadyptes antipodes) - Living - 56-78cm (22-31in) / 3-8.5kg 17. Gentoo Penguin (Pygoscelis papua) - Living - 51-90cm (20-35in) / 4.5-8.5kg 18. King Penguin (Aptenodytes patagonicus) - Living - 70-100cm (28-39 in) / 9-18kg 19. Emperor Penguin (Aptenodytes forsteri) - Living - 100-122cm (39.3-48in) / 22-45kg More video: Crocodile Size Comparison | Extinct / Prehistoric and Modern Crocodile | Animal Size Comparison 2020 https://youtu.be/NjbYb1HV1R0 Whale Size Comparison | Living and Extinct | Animal Size Comparison 2020 https://youtu.be/M_7Pmqq7f80 Shark size comparison | Living and Extinct | Animal Size Comparison 2020 https://youtu.be/anzxsn6cCH0 Tallest Statues in the World Height 2020 | Statues Size Comparison https://youtu.be/b-FaLE9cRpE WORLD'S TALLEST BUILDING Height Comparison from 1885-2022 (Evolution) | Size Comparison 2020 https://youtu.be/o9Sy2IbGC3g #sizecomparison #penguin #2021