This is a list of National Geographic cover stories including writers and photographers starting from January 2020.
For a complete list of cover stories from 1959 to 2024, see the List of National Geographic cover stories.
Title a | Date | Author | Photographer | Images b | Ref |
---|---|---|---|---|---|
Pain | January 2020 | Robert Clark, et al. | Magic Torch | Human brain | |
Last Journey into Slavery | February 2020 | Joel K. Bourne, Jr., et al. | Kadir Nelson | Slave ship | |
The End of Trash | March 2020 | Robert Kunzig | Luca Locatelli | Massive pile of clothes | |
How We Lost the Planet, How we Saved the World | April 2020 | Susan Goldberg | Imaginary Forces | Earth | |
You'll Miss Them When There Gone | May 2020 | Elizabeth Kolbert | David Liittschwager | Insects | |
The Last Voices of World War II | June 2020 | Lynne Olson | Robert Clark | Lawrence Brooks | |
Everest | July 2020 | Mark Synnott | William Faucett | Mount Everest | |
Stopping Pandemics | August 2020 | Richard Conniff | Max Aguilera-Hellweg | Man in a gas mask | |
Meet the Robots | September 2020 | David Berreby | Spencer Lowell | Robot hand | |
Reimaging Dinosaurs | October 2020 | Michael Greshko | Davide Bonadonna | Deinonychus | |
A World Gone Viral | November 2020 | Multiple authors & stories d | Cédric Gerbehaye | X-ray of human lungs | |
Saving the Great Lakes | December 2020 | Tim Folger | Keith Ladzinski | Lake Michigan |
Title a | Date | Author | Photographer | Images b | Ref |
---|---|---|---|---|---|
2020: 71 photographs from an Unforgettable year | January 2021 | Susan Goldberg | Kris Graves | Robert E. Lee Monument | |
Mysteries of a virus | February 2021 | David Quammen | Markos Kay | Mimivirus | |
Mars | March 2021 | Nadia Drake | ESA | Mars | |
The fight for Clean Air | April 2021 | Beth Gardiner | Matthieu Paley | Power plant in Ulaanbaatar | |
Secrets of the Whales | May 2021 | Craig Welch | Brian Skerry | Humpback whale | |
Reckoning with the Past | June 2021 | Cynthia Gorney | Kadir Nelson | Kadir Nelson painting | |
Beating the Heat | July 2021 | Alejandra Borunda | Elliot Ross | Tree canopy | |
Gladiators | August 2021 | Andrew Curry | Fernando Baptista | Thraex gladiator | |
Mysteries of the Solar System | September 2021 | Michael Greshko | Monica Serrano | Patroclus | |
The Revolution is Here | October 2021 | Craig Welch, et al. | Bose Collins | The future | |
100 Wonders of the World | November 2021 | Andrew Lawler | Kadir Nelson | Kadir Nelson painting | |
Welcome to Earth | December 2021 | Paula Kahumbu | Charlie Hamilton James | Egrets & Wildebeests |
Title a | Date | Author | Photographer | Images b | Ref |
---|---|---|---|---|---|
2021 The Year in Pictures c | January 2022 | — | Health professional | ||
Notre-Dame | February 2022 | Robert Kunzig | Tomas van Houtryve | Notre-Dame de Paris | |
Into the Depths | March 2022 | Tara Roberts | Wayne Lawrence | shipwrecks | |
Exploring Islands in the Sky | April 2022 | Mark Synnott | Renan Öztürk | A tepui | |
Saving Forests | May 2022 | Alejandra Borunda | Keith Ladzinski | Forest | |
The Power of Touch | June 2022 | Cynthia Gorney | Lynn Johnson | Woman and baby | |
We Are Here | July 2022 | Charles C. Mann | Kiliii YuYan | Native nations | |
Stonehenge Revealed | August 2022 | Roff Smith | Reuben Wu | Sunset at Stonehenge | |
America the Beautiful | September 2022 | Emma Marris | Stephen Wilkes | Bears Ears | |
Minds of Their Own | October 2022 | Yudhijit Bhattacharjee | Vincent Lagrange | Sphynx cat | |
Tuts Treasures | November 2022 | Paolo Verzone | Sandro Vannini | Tutankhamun | |
Pictures of the Year d | December 2022 | — | Arturo Rodríguez | Volcanic eruption |
Title a | Date | Author | Photographer | Images b | Ref |
---|---|---|---|---|---|
Living Longer and Better | January 2023 | Fran Smith | Jasper Doest | Older man skydiving | |
The Future is Folded | February 2023 | Maya Wei-Haas | Craig Cutler | Origami | |
Going Home | March 2023 | Andrew Curry | Richard Barnes | Bronze Head from Ife | |
8 Billion: The Population Paradox | April 2023 | Craig Welch | Justin Metz | Earth | |
Secrets of the Elephants | May 2023 | Srinath Perur | Brent Stirton | Asian elephants | |
Into the Wild | June 2023 | Peter Guin | Katie Orlinsky | Gila Hot Springs | |
Chasing the unknown | July 2023 | Multiple authors & stories d | Steven Alvarez | Ellison's Cave | |
An Arctic Mystery | August 2023 | Mark Synnott | Renan Öztürk | Peel Sound, Canada | |
Inside the Dome of the Rock | September 2023 | Andrew Lawler | Ziyah Gafić | Dome of the Rock | |
Space | October 2023 | Multiple authors & stories d | Saturn's moon Enceladus | ||
The Race to Save the Planet | November 2023 | Sam Howe Verhovek | Davide Monteleone | Geodesic dome | |
Pictures of the Year | December 2023 | Multiple authors d | Kyle Yuman | Yellow-lipped sea krait |
Title a | Date | Author | Photographer | Images b | Ref |
---|---|---|---|---|---|
Saving the Monarchs | January 2024 | Michelle Nijhuis | Jaime Rojo | Monarch butterflies | |
The Glass Age | February 2024 | Jay Bennett | Christopher Payne | Curled Sheet glass | |
Spotted Hyenas | March 2024 | Christine Dell'Amore | Jen Guyton | Infrared photo of a Spotted hyena and her cub, in Kenya. | |
Fabulous Fungi | April 2024 | Sarah Gibbens | Agorastos Papatsanis | Mushrooms of Kallipefki, Larissa, Greece | |
Secrets of the Octopus | May 2024 | Rachel Fobar | David Liittschwager | California two-spot octopus |
In nuclear engineering, fissile material is material that can undergo nuclear fission when struck by a neutron of low energy. A self-sustaining thermal chain reaction can only be achieved with fissile material. The predominant neutron energy in a system may be typified by either slow neutrons or fast neutrons. Fissile material can be used to fuel thermal-neutron reactors, fast-neutron reactors and nuclear explosives.
Fertile material is a material that, although not fissile itself, can be converted into a fissile material by neutron absorption.
Plutonium (94Pu) is an artificial element, except for trace quantities resulting from neutron capture by uranium, and thus a standard atomic weight cannot be given. Like all artificial elements, it has no stable isotopes. It was synthesized long before being found in nature, the first isotope synthesized being plutonium-238 in 1940. Twenty plutonium radioisotopes have been characterized. The most stable are plutonium-244 with a half-life of 80.8 million years; plutonium-242 with a half-life of 373,300 years; and plutonium-239 with a half-life of 24,110 years; and plutonium-240 with a half-life of 6,560 years. This element also has eight meta states; all have half-lives of less than one second.
Japan has a nationwide system of national highways distinct from the expressways. The Ministry of Land, Infrastructure, Transport and Tourism and other government agencies administer the national highways. Beginning in 1952, Japan classified these as Class 1 or Class 2. Class 1 highways had one- or two-digit numbers, while Class 2 highways had three-digit numbers. For example, routes 1 and 57 were Class 1 highways while 507 was a Class 2 highway.
The following is a complete list of cases decided by the United States Supreme Court organized by volume of the United States Reports in which they appear. This is a list of volumes of U.S. Reports, and the links point to the contents of each individual volume. Each volume was edited by one of the Reporters of Decisions of the Supreme Court. As of the beginning of the October 2019 Term, there were 574 bound volumes of the U.S. Reports. There were another 14 volumes worth of opinions available as "slip opinions", which are preliminary versions of the opinion published on the Supreme Court's website.
The third Mandala of the Rigveda has 62 hymns, mainly to Agni and Indra. It is one of the "family books", the oldest core of the Rigveda, which were composed in early Vedic period. Most hymns in this book are attributed to viśvāmitra gāthinaḥ
The following telephone numbers in Armenia are destination codes for international calls terminating in Armenia as well as the procedures for dialing internationally from within Armenia.
The Frisian freedom was period of absence of feudalism in Frisia during the Middle Ages. Its main aspects included freedom from serfdom, feudal duties and taxation, as well as the election of judges and adjudicators.
Marcello Toninelli is an Italian comics writer, best known as main writer of series of Zagor between 1982 and 1993.
The men's épée was one of eight fencing events on the fencing at the 1976 Summer Olympics programme. It was the seventeenth appearance of the event. The competition was held from July 22 to 23 1976. 64 fencers from 26 nations competed. Each nation was limited to 3 fencers. The event came down to a three-way barrage among the medalists, with two West German fencers joining Győző Kulcsár of Hungary in this tie-breaker fencing session. Alexander Pusch won against both opponents in the barrage to take gold, with Hans-Jürgen Hehn defeating Kulcsár for silver. The medals were the first for West Germany in the men's individual épée. Kulcsár's bronze made him the second man to earn three medals in the event.
Americium-241 is an isotope of americium. Like all isotopes of americium, it is radioactive, with a half-life of 432.2 years. 241
Am
is the most common isotope of americium as well as the most prevalent isotope of americium in nuclear waste. It is commonly found in ionization type smoke detectors and is a potential fuel for long-lifetime radioisotope thermoelectric generators (RTGs). Its common parent nuclides are β− from 241
Pu
, EC from 241
Cm
, and α from 245
Bk
. 241
Am
is not fissile, but is fissionable, and the critical mass of a bare sphere is 57.6–75.6 kilograms (127.0–166.7 lb) and a sphere diameter of 19–21 centimetres (7.5–8.3 in). Americium-241 has a specific activity of 3.43 Ci/g (126.91 GBq/g). It is commonly found in the form of americium-241 dioxide. This isotope also has one meta state, 241m
Am
, with an excitation energy of 2.2 MeV (0.35 pJ) and a half-life of 1.23 μs. The presence of americium-241 in plutonium is determined by the original concentration of plutonium-241 and the sample age. Because of the low penetration of alpha radiation, americium-241 only poses a health risk when ingested or inhaled. Older samples of plutonium containing 241
Pu
contain a buildup of 241
Am
. A chemical removal of americium-241 from reworked plutonium may be required in some cases.
Nishtar colony is an administrative zone in Lahore, Punjab, Pakistan. It forms one of 10 zones of the Lahore metropolitan area.