The Blood-Clot Problem Is Multiplying
So are theories to explain it.
Science
COVID-19 Vaccines Are Entering Uncharted Immune Territory
Some people’s bodies aren’t set up for vaccines.
A Tiny Ant Brain Is Still Too Big for Reproduction
Disturbingly light is the head that wears the crown.
3 Different Futures for the Johnson & Johnson Vaccine
A pause is just that—a pause—in which health officials can reevaluate the data at hand.
The Weekly Planet: The 1 Thing to Understand About Biden’s Infrastructure Plan
This is the only climate bill coming. Also: Why methane levels surged last year.
A Portal to Mars on the Tip of Iceland
A volcano erupting on the island is a living replica of what once happened on Mars.
The Sand Octopus Was Hiding in Plain Sight
And yet it took a 19th-century naturalist, a 21st-century grad student, and some Brazilian fishers to crack the mystery.
You Probably Have an Asymptomatic Infection Right Now
No, not COVID-19. Many, many viruses can infect humans without making us sick, and how they do that is one of biology’s deepest mysteries.
The Pandemic Is Undoing Field Researchers’ Oldest Assumption
With the right partners, scientists don’t have to visit their study sites to get good data.
An Interstellar Visitor Had a Sad Story to Tell
A hint of warmth from our sun helped reveal a mysterious comet’s secrets.