theSIGNAL SCIENCE
22 August 2026
"The single biggest problem in communication is the illusion that it has taken place."
NEWSBUSINESSTECHNOLOGYWORLDSCIENCECULTUREENVIRONMENTSPORT
Science

850 Ebola patients vanished — and no one knows where

The DRC's deadliest-ever Ebola outbreak is spreading faster than contact tracers can follow, and hundreds of confirmed cases have simply disappeared.

Picture this: 850 people have tested positive for one of the world's most lethal viruses, and nobody knows where they are. That is not a plot from a thriller. That is the Democratic Republic of Congo, right now. As of 15 August, officials had recorded 4,945 confirmed Ebola cases and 2,325 deaths since the outbreak was declared on 15 May.

When you subtract the 730 people in treatment centres and the 1,040 recorded survivors, you are left with that chilling gap of 850 souls — positive, unaccounted for, and potentially spreading the virus to everyone around them. Why is this outbreak so hard to stop? Part of the answer is biological. The strain causing this crisis is the Bundibugyo virus, a rarer form of Ebola for which no licensed vaccine or approved medicine yet exists.

That means the only real weapon is old-fashioned detective work: find every case, isolate it, then trace every single contact. The target is to reach 95% of contacts. Right now, Africa CDC estimates that health workers are tracing just 12%. The outbreak, as WHO Director General Dr Tedros Adhanom Ghebreyesus put it bluntly, "had a big head start, it is still way ahead of us and we are playing catch-up.

" The virus was almost certainly spreading unreported for months before May.

Photo: Nappy / Unsplash
A health worker screens passengers for Ebola symptoms near the DRC capital, Kinshasa, in August.
Discuss
  • Why might communities in conflict zones distrust government health workers arriving during an outbreak?
  • What does the 12% contact-tracing rate tell us about the gap between targets and reality in a crisis?
  • Uganda contained its imported outbreak to 20 cases — what factors might explain the difference with DRC?
Science

The Cliff That Built the Grand Canyon

One billion years before the Colorado River cut its first groove, something far stranger was already shaping the Grand Canyon. A towering cliff — roughly a kilometer high and stretching thousands of kilometers along ancient North America — was doing the heavy lifting. Scientists at the University of Southampton believe this escarpment formed around 800 million years ago, when the supercontinent Rodinia began splitting apart. Erosion along its enormous rocky face slowly dragged the canyon's deepest, oldest basement rocks toward the surface. The parallels are striking. That ancient cliff sat in almost exactly the same position relative to its continental edge as the great escarpments of South Africa and Brazil do today.…
  • Did a supercontinent's breakup shape more landscapes we recognize today?
∞
The outbreak had a big head start, it is still way ahead of us and we are playing catch-up.
Dr Tedros Adhanom Ghebreyesus, Director General, World Health Organization
Science

Drought Explains 74% of Wheat Price Swings

In 2012, more than 15% of the world's wheat fields were gasping for water — and shoppers from Lagos to Lyon paid more for bread without knowing why. A new study in *Earth's Future*, co-authored by Aarhus University's Jørgen E. Olesen, reveals that severe water scarcity alone explains 74% of annual global wheat price fluctuations between 2000 and 2021. The key word is "simultaneous": when droughts strike several major growing regions at once, markets panic. Strangely, the same relationship barely exists for rice, and only weakly for maize.…
  • Should governments stockpile wheat reserves in case of simultaneous global droughts?
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theSIGNAL IN THE LAB
1VOCABULARY
unaccounted forplaying catch-up
displacedescarpmentfluctuations
simultaneouslethal
2GRAMMAR FOCUS
Subjunctive mood — formal recommendations and requirements
Use the base form of the verb (infinitive without 'to') after expressions like 'it is essential/vital/crucial that' and 'recommend/suggest/demand/insist that', regardless of the subject — e.g. 'It is vital that she be tested' or 'WHO recommends that every contact be traced'.
be · receive · remain · establish · halt · undergo · share
  1. Health officials insist that every one of the 850 missing Ebola patients located before the outbreak can be brought under control.
  2. It is essential that Uganda its successful containment strategy with DRC authorities as quickly as possible.
  3. WHO recommends that all confirmed contacts monitored for at least 21 days after their last exposure to the virus.
  4. Community leaders demand that health workers trust with local populations before attempting to trace cases in conflict zones.
  5. Scientists suggest that the formation of the Grand Canyon's basement rocks linked to the ancient escarpment that existed 800 million years ago.
  6. It is vital that policymakers over-reliant on wheat imports from regions that are increasingly vulnerable to simultaneous droughts.
3COLLOCATIONS
Match the verb on the left with the noun phrase it best collocates with on the right.
  1. declare
  2. trace
  3. displace
  4. import
  5. explain
4CRITICAL THINKING
The articles suggest that scientific knowledge alone — knowing where a virus is, why a canyon formed, why wheat prices spike — does not automatically produce solutions. What structural factors, beyond a lack of information, tend to prevent societies from acting on what they already know? Use evidence from at least two of the three articles.
5CREATIVE · HEADLINES
Write a headline for the top story in each of the following styles. One line each, no explanation:
  • TABLOID NEWSPAPER
  • LUXURY MAGAZINE
  • ACTIVIST BLOG
6WRITING
The wheat price study shows that interconnected global markets can transmit local environmental shocks into worldwide hardship — a pattern arguably visible in the Ebola outbreak too. Write a short argument (150–200 words) explaining whether greater global interconnection makes humanity more or less vulnerable to natural crises, using specific evidence from the articles.
7DEGREES OF EXTREMITY
Complete each ladder from mild to strong.
  • uncommon→→
  • concerned→→
  • difficult→→
  • spread→→
  • skeptical→→
  • price rise→→
8SPEAKING
  1. How should health officials rebuild trust after a crisis ends?
  2. Who bears moral responsibility for the 850 unaccounted patients?
  3. Could ancient geology make certain regions more drought-prone today?
  4. Should global wheat markets be regulated differently from rice markets?