Research for first time suggests tendon and bones in heavier species would have made bounding possible

Giant 250kg kangaroos that once roamed Australia would probably have been able to hop despite their enormous size, researchers have said.

While modern kangaroos are known for their ability to travel large distances by jumping with both hind legs at the same time, it has long been debated whether their extinct relatives would have been so springy.

Prototaxites belonged to an ‘entirely extinct evolutionary branch of life‘

OpenAI, Anthropic, SpaceX and Stripe are rumoured to be among ten of the biggest companies considering IPOs

You’ve probably heard of “unicorns” – technology startups valued at more than $1bn – but 2026 is shaping up to be the year of the “hectocorn”, with several US and European companies potentially floating on stock markets at valuations over $100bn (£75bn).

OpenAI, Anthropic, SpaceX and Stripe are among the big names said to be considering an initial public offering (IPO) this year.

High-intensity interval training, or HIIT, could be leading to elevated muscle protein synthesis in the elderly

Handprints suggest Indonesian island was once home to a flourishing artistic culture

Archaeologists said the 500,000-year-old tool was fashioned by ‘ingenious’ prehistoric ancestors

• Discover and buy more of Ben’s cartoons here

• Order your own print of this cartoon from the Guardian Print Shop