91av

Regulars

Two seagulls above aircraft wing

This week’s new questions

Do winged animals like birds ever suffer comparable mishaps to human-made aircraft, such as aerodynamic stall, wing icing or hard landing? And how can popped knuckles be so exceptionally loud?

Regulars

Too fast, too furious? Ocelot and sloth caught in highish-speed chase

Regulars

91av Live: Inside the world’s best science and tech festival

Regulars

Tom Gauld on a mysterious new project

Regulars

Twisteddoodles asks Science a question

Regulars
A fully deployed OTIS, with the secondary mirror extended over the primary mirror, is removed from Chamber A after a successful thermal-vacuum test in 2017. Seen still in the chamber is a sunshield simulator, called the L5 Simulator, representing the fifth and innermost layer of the sunshield. The telescope would be shipped to the Northrop Grumman facility in California to be integrated with the real sunshield. I was suspended on a lift for this shot. Page 119

Space

A glimpse inside how the James Webb Space Telescope was put together

Regulars
F3875E Slicing into the breast of a freshly roasted chicken in pan with juices

Health

How to make sure your chicken is properly cooked

Regulars
The Supermoon rises over houses in Olvera, in the southern Spanish province of Cadiz, July 12, 2014. Occurring when a full moon or new moon coincides with the closest approach the moon makes to the Earth, the Supermoon results in a larger-than-usual appearance of the lunar disk. REUTERS/Jon Nazca (SPAIN - Tags: SOCIETY CITYSCAPE TPX IMAGES OF THE DAY) - GM1EA7D0FC401

When was it first realised that moonlight must be reflected sunlight?

Regulars
Ben Lomond ski village and wild kangaroos on a quiet winter's day in Tasmania, Australia; Shutterstock ID 1815999107; purchase_order: -; job: -; client: -; other: -

Would a northern hemisphere “ice age” trigger one in the south too?

Regulars
Big dog meets small dog; Shutterstock ID 2045462630; purchase_order: -; job: -; client: -; other: -

How do dogs recognise that another animal is also a dog? (continued)

One reader recalls a white terrier’s excitement on seeing a model of a polar bear in a shop window - showing that dogs don’t always get this right

Regulars

This week’s new questions

Regulars

Black hole discovered off Roman Road, Hereford, UK

Regulars

Tom Gauld on the best way to ask a supercomputer for help

Regulars

Twisteddoodles on Lab Life, a magazine for the break room

Regulars