World in focus - best photos for April 17, 2018

More galleries from The National:

On Women's Day

Dr Nawal Al-Hosany: Why more women should be on the frontlines of climate action

Shelina Janmohamed: Why shouldn't a spouse be compensated fairly for housework?

Justin Thomas: Challenge the notion that 'men are from Mars, women are from Venus'

The National Editorial: Is there much to celebrate on International Women's Day 2021?

Key facilities

Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
Premier League-standard football pitch
400m Olympic running track
NBA-spec basketball court with auditorium
600-seat auditorium
Spaces for historical and cultural exploration
An elevated football field that doubles as a helipad
Specialist robotics and science laboratories
AR and VR-enabled learning centres
Disruption Lab and Research Centre for developing entrepreneurial skills

Sole survivors

Cecelia Crocker was on board Northwest Airlines Flight 255 in 1987 when it crashed in Detroit, killing 154 people, including her parents and brother. The plane had hit a light pole on take off
George Lamson Jr, from Minnesota, was on a Galaxy Airlines flight that crashed in Reno in 1985, killing 68 people. His entire seat was launched out of the plane
Bahia Bakari, then 12, survived when a Yemenia Airways flight crashed near the Comoros in 2009, killing 152. She was found clinging to wreckage after floating in the ocean for 13 hours.
Jim Polehinke was the co-pilot and sole survivor of a 2006 Comair flight that crashed in Lexington, Kentucky, killing 49.

The biog

Hometown: Cairo

Age: 37

Favourite TV series: The Handmaid’s Tale, Black Mirror

Favourite anime series: Death Note, One Piece and Hellsing

Favourite book: Designing Brand Identity, Fifth Edition

Royal Birkdale Golf Course

Location: Southport, Merseyside, England

Established: 1889

Type: Private

Total holes: 18

Easter%20Sunday

%3Cp%3EDirector%3A%20Jay%20Chandrasekhar%3Cbr%3EStars%3A%20Jo%20Koy%2C%20Tia%20Carrere%2C%20Brandon%20Wardell%2C%20Lydia%20Gaston%3Cbr%3ERating%3A%203.5%2F5%3C%2Fp%3E%0A

Indoor Cricket World Cup - Sept 16-20, Insportz, Dubai

Match info

Uefa Nations League A Group 4

England 2 (Lingard 78', Kane 85')
Croatia 1 (Kramaric 57')

Man of the match: Harry Kane (England)

Squad for first two ODIs

Kohli (c), Rohit, Dhawan, Rayudu, Pandey, Dhoni (wk), Pant, Jadeja, Chahal, Kuldeep, Khaleel, Shami, Thakur, Rahul.

What is graphene?

Graphene is a single layer of carbon atoms arranged like honeycomb.

It was discovered in 2004, when Russian-born Manchester scientists Andrei Geim and Kostya Novoselov were "playing about" with sticky tape and graphite - the material used as "lead" in pencils.

Placing the tape on the graphite and peeling it, they managed to rip off thin flakes of carbon. In the beginning they got flakes consisting of many layers of graphene. But as they repeated the process many times, the flakes got thinner.

By separating the graphite fragments repeatedly, they managed to create flakes that were just one atom thick. Their experiment had led to graphene being isolated for the very first time.

At the time, many believed it was impossible for such thin crystalline materials to be stable. But examined under a microscope, the material remained stable, and when tested was found to have incredible properties.

It is many times times stronger than steel, yet incredibly lightweight and flexible. It is electrically and thermally conductive but also transparent. The world's first 2D material, it is one million times thinner than the diameter of a single human hair.

But the 'sticky tape' method would not work on an industrial scale. Since then, scientists have been working on manufacturing graphene, to make use of its incredible properties.

In 2010, Geim and Novoselov were awarded the Nobel Prize for Physics. Their discovery meant physicists could study a new class of two-dimensional materials with unique properties.