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3,585 results
3,585 results for: assessments
- Life
Two new books investigate why it’s so hard to define life
For centuries, scientists have struggled to define what it means to be alive. ‘What Is Life?’ and ‘Life’s Edge’ explore the question.
- Anthropology
Ardi may have been more chimplike than initially thought — or not
A contested study of hand and foot fossils suggests this 4.4-million-year-old hominid was a tree climber and branch swinger.
- Astronomy
Signs of a hidden Planet Nine in the solar system may not hold up
Hints of a remote planet relied on clumped up orbits of bodies beyond Neptune. A new study suggests that clumping is an illusion.
- Health & Medicine
Nearly half a million U.S. children missed out on lead tests in early 2020
A big drop in routine lead tests, which can identify children with elevated blood levels, is another troubling sign of the pandemic’s toll.
- Health & Medicine
Can a COVID-19 vaccine’s second dose be delayed? It’s complicated
New data indicate that delaying second doses of COVID-19 vaccines may still provide protection, but some scientists aren’t convinced it’s OK.
- Psychology
The COVID-19 pandemic made U.S. college students’ mental health even worse
College students struggled with mental health problems before the pandemic. Now, some vulnerable students are even more at risk.
- Earth
Three things to know about the disastrous flood in India
The flood, which killed at least 30 people, may have been caused by a collapsing glacier or a landslide, with climate change possibly playing a role.
- Climate
Ship exhaust studies overestimate cooling from pollution-altered clouds
Lines of clouds formed by ship exhaust offer a window into aerosol-cloud interactions but may overestimate how much pollution-altered clouds cool the climate.
- Climate
2020 and 2016 tie for the hottest years on record
Ocean temperature data as well as temperatures measured over land at weather stations around the globe revealed the extent of the warming.
- Physics
‘Fundamentals’ shows how reality is built from a few basic ingredients
In ‘Fundamentals,’ physics Nobel laureate Frank Wilczek shares essential lessons from physics.
- Genetics
DNA databases are too white, so genetics doesn’t help everyone. How do we fix that?
A lack of diversity in genetic databases is making precision medicine ineffective for many people. One historian proposes a solution: construct reference genomes for individual populations.
- Space
Solar storms can wreak havoc. We need better space weather forecasts
Solar storms can devastate power grids and other systems on Earth. We need better forecasting
