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Hello Nature readers,

Today we discover that tiny animals have been found in a long-buried Antarctic lake, learn how fever helps us battle infection and get real about the link between screen time adolescent well-being. 

Researchers used a hot-water drill to bore through a kilometre of ice, creating a portal with a diameter of just 60 centimetres. (Billy Collins/SALSA Science Team) 

EXCLUSIVE: Tiny animal carcasses found in buried Antarctic lake 

Ancient crustaceans and a tardigrade have been discovered in a buried Antarctic lake that has just been explored for the first time. Subglacial Lake Mercer had lain undisturbed for thousands of years until researchers succeeded in melting a narrow portal through the ice on 26 December. Scientists thinks that the creatures inhabited the waters of nearby mountains sometime in the past, before the area was smothered in ice, and then were somehow carried into the lake.

Nature | Read this article at nature.com/latest-news

Scientists are preparing for a chaotic no-deal Brexit 

British scientists are preparing for the ever more likely scenario that the United Kingdom will crash out of the European Union on 29 March without any trade and migration agreements in place. Vital lab supplies could be in jeopardy as trade tariffs take effect at the border, EU funding would be cut off for UK-based research and uncertainty hangs over the heads of EU-citizen scientists who work in Britain (and vice versa).

Nature | Read this article at nature.com/latest-news

How a fever helps us to battle infection 

A fever fights infection by helping immune cells to crawl along blood-vessel walls to attack invading microbes. Scientists found that a fever triggers immune cells to produce proteins that protect cells against the heat. The proteins also kick off a reaction that helps T cells migrate to infection sites.

Nature | Read this article at nature.com/nature/articles?type=research-highlight

Reference: Immunity paper 

FEATURES & OPINION

Screen time boogeyman disappears in the light 

A huge analysis of the data on digital-technology use and adolescent well-being found a statistically significant negative association between the two. But the effects explained at most 0.4% of the variation in well-being — smaller than the negative association of wearing glasses. The digital revolution is without doubt changing modern life, argues a Nature editorial, and we need more and better data to work out what impact that is having.

Nature | Read this article at nature.com/nature/articles?type=editorial

Mystery DNA might help during hungry times 

In this week’s podcast, we explore how stretches of non-coding DNA, called introns, in genes  could have an important function: helping cells to survive starvation. Also in the podcast this week, we hear how scientists are using a robot to simulate the gait of a creature that lived before the dinosaurs.

Nature Podcast | Listen to nature.com/nature/articles?type=nature-podcast

SCIENTIFIC LIFE

Make the most of your ‘20% time’ 

Inspired by a Google initiative, data-driven business-development postdoc Carsten Lund Pedersen decided to put aside 20% of his time for personal passion projects on a regular basis. He explains how he carves out the time for curiosity-driven exploration.

Nature | Read more at nature/articles?type=career-column

BOOKS & ARTS

Snow leopards in the high Asian mountains have been aided by the creation of national parks. (Steve Winter/National Geographic Creative) 

Saving snow leopards in a war zone 

In a new book, conservationist Alex Dehgan shares the trials, triumphs and occasional absurdity of building a conservation programme in extreme circumstances — including, on a few occasions, staring down the barrel of an AK-47 rifle. 

Nature | Read this article at nature.com/books-culture

Five best science books this week 

Barbara Kiser’s pick of the top five science books to read this week includes the paradox of human nature, our obsession with the skies, and the realities of transplant surgery.

Nature | Read this article at nature.com/books-culture

This newsletter is always evolving — tell us what you think! Please send your feedback to briefing@nature.com.

Thanks for reading!

Flora Graham, senior editor, Nature Briefing 

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