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If vaccination rates fail to keep pace with its spread, the Delta variant could lead to new COVID surges in parts of the country where a substantial proportion of the population remains unvaccinated.https://www.scientificamerican.com/article/how-dangerous-is-the-delta-variant-and-will-it-cause-a-covid-surge-in-the-u-s/ …

A blistering heat wave obliterated high temperature records in Oregon and Washington over the weekend, ratcheting up risks for deaths and fires, and underscoring the dangers of climate change.https://www.scientificamerican.com/article/unprecedented-heat-wave-in-pacific-northwest-driven-by-climate-change/ …

Fans are worse than useless in extreme heat. But they can still help cool people off in ultrahot conditions—as long as the humidity is relatively high.https://www.scientificamerican.com/article/fans-may-be-okay-for-muggy-days-but-avoid-them-in-extreme-dry-heat/ …

Most tree hyrax species have loud, repetitive shrieking cries that you hear only at night. A new species has been identified based on its distinctive call. Just be warned: it sounds a lot like a human scream. | Podcasthttps://www.scientificamerican.com/podcast/episode/this-newly-discovered-species-of-tree-hyrax-goes-bark-in-the-night/ …

Foster children had basic services suspended during the pandemic, including financial, educational, social, mental health and even some housing support. Here's how volunteers are trying to help.https://www.scientificamerican.com/article/how-the-pandemic-roiled-the-foster-care-system/ …

In a 35-year-old man with auburn hair, five strands of hair underwent graying reversal during the same time span, which coincided with a two-week vacation.https://www.scientificamerican.com/article/gray-hair-can-return-to-its-original-color-mdash-and-stress-is-involved-of-course/ …

The last known white tiger in the wild was killed in 1958, but they're a huge proportion of the captive tiger population due to continual inbreeding, primarily by commercial operations that produce cubs with severe health problems. | Opinionhttps://www.scientificamerican.com/article/the-tragedy-of-the-white-tiger/ …

A biologist in the U.S. has "excavated" partial SARS-CoV-2 genome sequences from the beginnings of the pandemic’s probable epicenter in Wuhan, China, that were deposited — but later removed — from a U.S. government database.https://www.scientificamerican.com/article/deleted-coronavirus-genome-sequences-trigger-scientific-intrigue/ …

Dry lands are at a breaking point — and it's more closely tied to temperature than previously thought.https://www.scientificamerican.com/article/unexpected-desert-plants-are-struggling-in-higher-heat/ …

“When you’re dealing with an institutional structure like global science, one of its core features is that it has been a racial structure,” says sociologist @anthonyrhatch.https://www.scientificamerican.com/article/the-time-to-dismantle-the-racial-structures-that-pervade-global-science-is-now/ …

A study shows that when couples blamed their daily stressors on the pandemic, each person ended up happier with their partner despite the unprecedented burdens brought on by the disaster.https://www.scientificamerican.com/article/its-not-you-its-covid-couples-who-blamed-pandemic-for-tensions-stayed-happier/ …