10 great minds we lost in 2018

Renowned scientists and technologists who've passed away in 2018.

Stephen Hawking gives a talk. When did Stephen Hawking die?

Legendary physicist Stephen Hawking passed away on March 14, 2018.

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  • We lost a great deal of internet pioneers and geniuses of physics in 2018.
  • Creations of fiber optic cables, men on the moon and the unsung heroes of the life sciences made their mark on the scientific enterprise.
  • The loss of men like Stephen Hawking leaves a hole in the sciences, but his work and many others will continue to inspire the generations to come.

Death is an inevitability every passing year. As time marches on to the eternal beyond, we look to some of the great minds we lost in 2018. Many celebrities, musicians and politicians have graced the grave's ledger. Their praises have been sung far and wide. Here we remember and reflect upon the great accomplishments of a few notable titans of science and technology.

Paul G. Allen 

Paul G. Allen was many things to many people. He had a long list of pursuits, talents and genius through his lifetime. From revolutionizing the world in the age of the PC as one of the founders of Microsoft, to running the scientific philanthropist outfit known as the Allen Institute. He had an unflinching curiosity to dig deep into the genome and the neurological centers of humankind itself.

Allen succumbed to cancer earlier this year on October 15th. Throughout his life he amassed a large fortune from Microsoft, which he put to use in the most noble of ways until the very end. His legacy will continue on in the research coming out of the Allen institute for Artificial Intelligence and the many other great things he left behind.

Kuen Charles Kao

Underpinning the entirety of our interconnected world are miles of fiber-optic cables. The man responsible for the first kernel of this idea was Kuen Charles Kao. In 1966 he proposed the use of optical fibers as the major infrastructure for communication. During his heyday, telecommunications used either coaxial electronic cables or broadcast radio signals. Kao among a few others wrote a largely unnoticed paper that would go on to influence and change the course of the world. For this eventual work he set out to do, he'd go on to win the Nobel Prize in Physics in 2009. He died in Hong Kong on September 23rd.

Osamu Shimomura

Born in 1928 in the town of Fukuchiyama, during the height of Japanese expansion, Osamu Shimomura lived through dark and perilous times. Against all odds he went through school and the hardships of his upbringing to eventually discover a crucial component for the biomedical sciences. He discovered the green fluorescent protein (GFP,) which would be the fundamental tool used by researchers to code and confirm the insertion of genes. He shared the Nobel Prize in Chemistry in 2008 with chemist Roger Tsien and neurobiologist Martin Chalfie.

Shimomura died in Nagasaki, Japan on October 19th, He was the first to show that a protein could be fluorescent and contain a light-emitting function in its own protein peptide chain. His pioneering research has allowed this discovery to be used as a tool for inserting genes into other organisms. Until the aequorin, which he discovered and named, was able to be genetically engineered – he freely shared his massive stock he'd collected to laboratories around the world.

Thomas A. Steitz 

Carrying on the work of what Francis Crick called the central dogma of biology - the genes - Thomas A. Steitz would go on to discover the secrets of the ribosome. In 2009 he received a Nobel Prize in Chemistry for his work that contributed to solving the structure of the ribosome, the component responsible for translating genetic information into proteins from the cell. Steitz was a crystallographer who came from a humble background and continued to push forth the important work up until the day he died on October 9th. A colleague of his, Peter Moore, once called him: "the most accomplished structural biologist of his generation."

Stephen W. Hawking

One of the most famous physicists of our time, Stephen W. Hawking roused the public's attention for his deep pursuit into the mysteries of the universe. Theoretical physicist Michio Kaku said of Hawking after his death:

"Not since Albert Einstein has a scientist so captured the public imagination and endeared himself to tens of millions of people around the world."

A unique figure who's adversity against total paralysis became a symbol of human determination and strength, Hawking didn't let his long-running physical ailments stop his triumph for truth. He'd go onto become our leading voice on the strange physics of black holes and quantum theory.

Alan Bean

Alan Bean was the fourth man to step foot and walk on the moon. In his later years he turned to painting as he told the grand story of one of our most important achievements of mankind. Alan Bean stepped onto the Lunar surface after the Apollo 12 flight some four months after Neil Armstrong and Buzz Aldrin had first landed on the moon. Although not the first flight or given as much fanfare as Apollo 11, this mission resulted in a more thorough exploration of the moon. Bean would go on to command a flight to the orbiting space station Skylab and set a record for being in space for 59 consecutive days.

Dorothy Cheney 

Dorothy L. Cheney changed the dynamics of we view the primate life and social structure. With her husband and research partner, Professor Robert M. Seyfarth, they did some of the most important field work with baboons. In a comment about her life in the New York Times it was said:

"Along with Robert Seyfarth, she did wonderfully clever, elegant field experiments that revealed how other primates think about the world — showing that they think in far more sophisticated and interesting ways than people anticipated."
Much of their research was put into the book: How Monkeys See the World: Inside the Mind of Another Species "The most human features of monkeys and apes lie not in their physical appearance but in their social relationships." Cheney helped change and usher in a new way of research to view and understand our primate cousins, by existing in their home territory and seeing their lives in natural action.

Frank Heart 

Frank Heart was the engineer who oversaw the first development of a routing computer for the famous Arpanet, the government's precursor to the internet. In 1969, he led a small team of engineers that would go on to build something called the Interface Message Processor (I.M.P.) The computer's main function was to switch data among other computers connected on the Arpanet. Much of what Heart was doing made it a necessity for him to invent while he went along, things that are fundamental to the internet like error resistance. Mr. Heart invented much of the technology that would go on to be the basis for the router systems we use today.

Leon Lederman

Leon Lederman was a physicist that delved into a wide range of new areas of fundamental physics. He would go on to discover things such as the muon neutrino, neutral kaon meson and learned about something called bottom quarks which make up the fundamental parts of neutrons and protons. Born in 1922 to Jewish Russian emigrants, he lived in a time when Jewish scientists were fleeing Europe en masse. He was part of a cadre of genius physicists who'd help revolutionize the field in the early 20th century.

He shared the 1988 Nobel Prize in physics for his work on the discovery that fundamental particles require symmetry as an intrinsic part of the natural order of things. His scientific legacy lives on as there are continued efforts to explore the many particles he discovered.

Aaron Klug

Aaron Klug was responsible for mapping the structure of viruses. He discovered the geometrical rules and eventual form of the poliovirus. Klug invented electron tomography, which resulted in the three dimensional image of a virus. This won him the Nobel Prize in Chemistry in 1982. Other components of his work would go on to allow him and the many scientists that came after him, the ability to initiate the transcription of RNA, which would become the basis for gene therapy. Klug was knighted in 1988. Throughout his life we went on to lead the Medical Researcher Council and Laboratory of Molecular Biology in the Royal Society.

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Astronomers find more than 100,000 "stellar nurseries"

Every star we can see, including our sun, was born in one of these violent clouds.

Credit: NASA / ESA via Getty Images
Surprising Science

This article was originally published on our sister site, Freethink.

An international team of astronomers has conducted the biggest survey of stellar nurseries to date, charting more than 100,000 star-birthing regions across our corner of the universe.

Stellar nurseries: Outer space is filled with clouds of dust and gas called nebulae. In some of these nebulae, gravity will pull the dust and gas into clumps that eventually get so big, they collapse on themselves — and a star is born.

These star-birthing nebulae are known as stellar nurseries.

The challenge: Stars are a key part of the universe — they lead to the formation of planets and produce the elements needed to create life as we know it. A better understanding of stars, then, means a better understanding of the universe — but there's still a lot we don't know about star formation.

This is partly because it's hard to see what's going on in stellar nurseries — the clouds of dust obscure optical telescopes' view — and also because there are just so many of them that it's hard to know what the average nursery is like.

The survey: The astronomers conducted their survey of stellar nurseries using the massive ALMA telescope array in Chile. Because ALMA is a radio telescope, it captures the radio waves emanating from celestial objects, rather than the light.

"The new thing ... is that we can use ALMA to take pictures of many galaxies, and these pictures are as sharp and detailed as those taken by optical telescopes," Jiayi Sun, an Ohio State University (OSU) researcher, said in a press release.

"This just hasn't been possible before."

Over the course of the five-year survey, the group was able to chart more than 100,000 stellar nurseries across more than 90 nearby galaxies, expanding the amount of available data on the celestial objects tenfold, according to OSU researcher Adam Leroy.

New insights: The survey is already yielding new insights into stellar nurseries, including the fact that they appear to be more diverse than previously thought.

"For a long time, conventional wisdom among astronomers was that all stellar nurseries looked more or less the same," Sun said. "But with this survey we can see that this is really not the case."

"While there are some similarities, the nature and appearance of these nurseries change within and among galaxies," he continued, "just like cities or trees may vary in important ways as you go from place to place across the world."

Astronomers have also learned from the survey that stellar nurseries aren't particularly efficient at producing stars and tend to live for only 10 to 30 million years, which isn't very long on a universal scale.

Looking ahead: Data from the survey is now publicly available, so expect to see other researchers using it to make their own observations about stellar nurseries in the future.

"We have an incredible dataset here that will continue to be useful," Leroy said. "This is really a new view of galaxies and we expect to be learning from it for years to come."

Protecting space stations from deadly space debris

Tiny specks of space debris can move faster than bullets and cause way more damage. Cleaning it up is imperative.

  • NASA estimates that more than 500,000 pieces of space trash larger than a marble are currently in orbit. Estimates exceed 128 million pieces when factoring in smaller pieces from collisions. At 17,500 MPH, even a paint chip can cause serious damage.
  • To prevent this untrackable space debris from taking out satellites and putting astronauts in danger, scientists have been working on ways to retrieve large objects before they collide and create more problems.
  • The team at Clearspace, in collaboration with the European Space Agency, is on a mission to capture one such object using an autonomous spacecraft with claw-like arms. It's an expensive and very tricky mission, but one that could have a major impact on the future of space exploration.

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